How to Fix the Dnssd.dll Error Code

Error Code 0x8007267C – What is it?

Error code 0x8007267C is specific to Windows 10. This error is triggered when no DNS server is currently configured in your network settings during the Activation process. If you are fairly confident in your ability to address command-line tools and networking issues, you can follow the steps below to try to remedy the error code on your own. If not, you may need to contact a qualified technician in order to resolve the error successfully.

Solution

Error Causes

The cause of Error Code 0X8007267C within the Window 10 system is fairly straightforward. Windows Activation requires a valid DNS server to be configured in order to complete the Activation process; if one is not available or properly configured, then you may see this error code and Activation will fail.

Further Information and Manual Repair

The following methods may help you to resolve this error, but you’ll need to have some familiarity with command-line tools to complete the steps successfully. If these methods do not work or if you are uncomfortable in using the command prompt, you may need to consult a technician to fully resolve this particular error code on the Windows 10 system.

Method 1: Register a DNS server within your network properties and test the connection.

In order to resolve this error code, client connectivity to a DNS server must first be established. The following steps may help you to determine the root problem with your connectivity status:

1. Open a command prompt, after which you'll run IPCONFIG /all
2. Verify the following values: The IP address that has been assigned, the DNS server, the subnet mask, and the default gateway. Compare each to ensure that all are set with the values that correspond to your specific environment
3. Check for basic IP connectivity to the DNS server using the PING command. In using the PING command, utilize the address of the DNS server found in Step 1

ping <DNS Server IP address>

If basic connectivity to the DNS server in question is failing, then you will need to resolve that issue before going further in the process.

After troubleshooting the above basic connectivity issues to the DNS server, you can reattempt Windows Activation by using the command below from within an Elevated Command selection:

cscript windowssystem32slmgr.vbs -ato

If the steps above did not work for you, you may want to try the steps found in method 2.

Method 2: Use phone-based authentication with a MAK (multiple activation key).

If a DNS server is not connected to your network, you can use an alternative method to complete the Windows Activation process. Bypass Method 1 by using a MAK product key instead to activate the volume license installation. Certain MAK product key providers have a variation on the specific key numbers that you will need to use. If you are using TechNet media or MSDN media, you will have to change the product key listed to the product key provided. The product keys provided by either TechNet media or MSDN media for Windows Server 2008 or for Windows Vista Enterprise will be the MAK product key that you will enter in a later step.

Like the previous method, you will need to have some familiarity or confidence in your ability to operate Command Line tools before proceeding. Once you have found your MAK product key, you’ll need to open a command prompt and use the following command to change the product key to match the MAK product key, which should look something like the example below:

            slmgr –ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

After completing the product key change, use the following command to initiate the phone activation wizard, thereby completing the activation of the system:

            slui 04

The activation wizard should be able to walk you through the remainder of the process in a step-by-step manner. In addition to appearing as an error code in Windows 10, this particular error may apply to multiple versions of Windows, including:

• Windows 7 Enterprise
• Windows 7 Enterprise E
• Windows 7 Enterprise N
• Windows 7 Professional
• Windows 7 Professional E
• Windows 7 Professional N

Steps to address the error code may be different in any of these other versions of Windows. If you have difficulty in resolving the error effectively, seek professional technical help.

The NVIDIA Control Panel is a useful tool for users who have NVIDIA graphics on their PCs as this tool allows users to how the graphics card is used on the computer using several controls that come with the graphics card from NVIDIA. Thus, it can be quite inconvenient when it suddenly crashes all of a sudden for some reason. This kind of problem could be due to the toggling of Output Dynamic Range is limited, or there could be some issue with the integrity of the Power Supply for the graphics card, and many more. So if you are using NVIDIA on your computer and its Control Panel keeps on crashing on your Windows 10 computer, then you’ve come to the right place as this post will guide you in sorting the problem out. For more details, refer to the guidelines laid out below.

Option 1 – Try to toggle the Output Dynamic Range

The first thing you can do to fix the problem is to toggle the Output Dynamic Range by following these steps:

• Navigate to this path: Display > Change resolution.
• Next, scroll a bit on the right-side panel until you see the Output Dynamic Range drop-down.
• After that, select “Full” from the drop-down menu.
• Apply the changes you’ve made and see if it is able to fix the problem with the NVIDIA Control Panel.

Option 2 – Try changing the Power Management and Vertical Sync settings

The next thing you can do to fix the problem is to change the Power Management, as well as the Vertical Sync settings.

• Open the NVIDIA Control Panel and go to this path: 3D Settings > Manage 3D Settings.
• Next, set the Power Management to be “Prefer Maximum Performance” for your processor located on the right-side panel.
• After that, set the Vertical sync setting off and then click on the Apply button located at the bottom-right portion of the window and check if it is able to fix the problem or not.

Option 3 – Try updating the drivers from the official site of NVIDIA

If both the first and second given options didn’t work, you can also try updating the drivers from the official NVIDIA website. And in case you don’t know the type of Nvidia graphics card that your computer is on, follow the steps below:

• Tap the Win + R keys to open the Run dialog box.
• Next type in “dxdiag” in the field and click OK or hit Enter to open the DirectX Diagnostic Tool.
• From there, you can see what type of Nvidia graphics card that your system is on.
• Take note of your graphics card information and then look for the best drivers for your operating system. Once you’ve downloaded and installed the file, restart your PC.

Option 4 – Try to roll back the driver to the previous version

If updating the NVIDIA display drivers didn’t work for you, then it’s time to roll back the device drivers. It is most likely that after you updated your Windows computer that your driver also needs a refresh.

• Tap the Win + R keys to launch the Run window and then type in the “MSC” command and hit Enter to open the Device Manager window.
• Under the Device Manager, you will see a list of drivers. From there, look for the NVIDIA Drivers and expand it.
• Next, select the driver entries that are labeled appropriately.
• Then select each one of them and double click to open a new mini window.
• After that, make sure that you’re on the Driver tab and if you are not, just navigate to it then click the Roll Back Driver button to switch back to the previous version of the NVIDIA Drivers.
• Now restart your computer to successfully apply the changes made.

Random freezing in a Windows in the middle of work can be a very frustrating experience and can even cost us the loss of work. From time delays to sometimes complete crashes this behavior is something that every PC user wants to avoid or at least have very little of. In this article, we will cover solutions on what to do and how to fix the random freezing of computers.

1. Run a virus scan on your computer.

   Viruses and other malware can cause freezes and other issues in your computer, run a complete system scan for any kind of viruses and malware and if needed remove them.

2. Uninstall applications that you are not using

   Besides taking your hard drive space some applications can have and require to have some services always running on your computer which can cause some issues, if an application is not needed and it is not used, removing it might solve freezing issues.

3. Increase RAM memory

   Sometimes the problem with freezing is not a software issue, having less RAM memory than the application requires can cause the application not to work properly and it can cause freezing of the entire system since precious RAM can not be allocated to the required application.

4. Run system checker

   Corrupted Windows system files can cause freezing of the entire system, to fix this, start the command prompt in administrator mode and type sfc /scannow

5. Keep running applications to a minimum

   Having too many applications running in the background can drain system resources and can cause system freezes because of lack of memory. Close applications that are running in the background and keep them minimal.

6. Delete files and folders which you are not using

   Having many files and/or folders on the hard drive can cause a lot of system resources to be wasted, from indexing size to less free space for caching. If you have files that you no longer need, removing them will free up space and can increase performance and introduce the stability.

7. Run memory check

   Memory issues could lead to system freezing. When an application needs to write or read to a corrupted memory cluster, freezing will occur since it can not. To check memory bring up run dialog and type in ti mdsched.exe, click on restart now and let the memory test finish.

8. Update all drivers

   Hardware issues can cause freezing of applications and having the latest drivers can make a world of difference. Make sure that you have all device drivers to the latest versions.

9. Optimize Disk drives and check for errors

   Windows 10 has built-in tools to check hard drives for errors and to optimize them, use them in order to see if this issue is causing freezes.

10. Clean your registry

    A Clean registry is a happy registry and Windows is appreciating it. Make sure that you do not have any keys which you do not need in the registry and that long-forgotten application trails are deleted for good.

11. Upgrade SSD firmware

    Like updating drivers, updating firmware is also important, and having the latest firmware for your SSD can help a lot, newer firmware can eliminate freezing if the issue was in Windows not using SSD properly.

12. Update BIOS

    Like updating SSD firmware can help so it can update Firmware on your BIOS. Make sure that you have the latest firmware version and freezing can go away if that was the issue.

If you are trying to open a program or a game but you suddenly see a dialog box with a message stating that the application was unable to start correctly along with the Error Code 0xC000007B , STATUS INVALID IMAGE FORMAT then this indicates that the application is not compatible with the architecture of your Windows 10 computer or is missing dependencies. Although error code 0xC000007B can also occur with other various programs, the STATUS_INVALID_IMAGE_FORMAT error code also means that when you try to run an application that’s designed to run on a 64-bit system and hence gets into a termination state. In addition, if you are also pointed to the NTStatus.h file then it means that the error might be caused by some file corruption. Here’s the full context of the error message:

“0xC000007B | STATUS_INVALID_IMAGE_FORMAT | {Bad Image} %hs is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support.”

When you see this error message, the first thing you can do is to click on OK to close the application and then try installing the media again to see if it fixes the issue. If not, then you can check out the suggestions given below.

Option 1 – Try installing the application with admin privileges

The first thing you can do to fix the error is to restart your Windows 10 computer and then try installing the application again and this time with admin privileges. Just right-click on the application and select the “Run as Administrator” option. And if your account is a regular one, you need to make sure to ask an admin to help you in installing the application by entering the password when you are prompted to do so.

Option 2 – Install and update Dependencies

There are times when programs and applications need to have drivers and supporting software installed for them to properly work. Although the installation usually takes care of it, it’s time for you to do some manual checks especially if you are getting this issue of abnormal program termination.

1. Install some qualified drivers

A number of high-end games and applications need to have correct and valid drivers for them to work. They just don’t work with general drivers though. Microsoft has this Windows Hardware Quality Labs testing also known as WHQL testing which makes sure that drivers meet the correct experience and pass through the proper testing before certification. Thus, when installing drivers, you need to ensure that they are qualified drivers for your Windows 10 PC.

2. Download and install or update DirectX

As you know, Microsoft DirectX is a suite of technologies developed by Microsoft to provide hardware acceleration for heavy multimedia applications like HD videos and 3D games. Since you are using Windows 10, you have the DirectX 12 version while the earlier Windows versions use the DirectX 11 version.

3. Install the Microsoft DirectX End-user runtime

The Microsoft DirectX end-user runtime gives updates to version 9.0c as well as previous versions of DirectX. To install it, click on this link and download it.

4. Update or install the .NET framework

The .NET framework is used by games and applications during development which means that without the runtime files that are installed in your computer, it definitely won’t work. Thus, you need to install or update this framework. You can also use the .NET setup verification tool to verify it.

Option 3 – Try running the System File Checker Scan

The SFC or System File Checker scan could detect and automatically repair damaged system files that could be causing the Error Code 0xC000007B , STATUS INVALID IMAGE FORMAT error. SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files with good system files. To run the SFC command, follow the steps given below.

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

KMODE_EXCEPTION_NOT_HANDLED – What is it?

Some users installing or upgrading to Windows 10 experienced the theKMODE_EXCEPTION_NOT_HANDLED Blue Screen of Death (or commonly known as BSOD) error. This error can be due to different types of things, ranging from software to driver issues. When you experience this BSOD error while trying to install Windows 10, it will prompt you to restart your computer every single time you experience it. In most cases, you will also not be able to proceed with the Windows 10 set-up.

Solution

Error Causes

The “KMODE_EXCEPTION_NOT_HANDLED” error is normally caused by:

• Hardware incompatibility
• A faulty device driver or system service

Further Information and Manual Repair

You won’t be able to successfully upgrade or set up Windows 10 if you continue to encounter this BSOD error. Note that this error will always prompt your computer to restart every time it happens, preventing you from completing the Windows 10 set-up.

If you’re not tech-savvy or not capable of debugging this issue, it’s highly advisable to proceed with the basic troubleshooting techniques available in this link.

After troubleshooting, below you’ll find a few solutions to rectify the issue.

Method 1 – Check The Cause of The BSOD Error

Two common causes of the KMODE_EXCEPTION_NOT_HANDLED issue are hardware incompatibility and faulty device driver or system service.

If you experience this error, check first if any of your newly installed hardware is compatible with Windows 10. You can find the required hardware for Windows 10 from this link. 

If all your hardware is compatible with Windows 10, you might need to check the device driver or system service. Review the bug check message. If any of the drivers you have is listed in the message, either disable or uninstall them before upgrading or setting up Windows 10.

You might also find it useful to check the System Log available in the Event Viewer for other error messages that can help you figure out the driver or device that’s causing the error. Running hardware diagnostics can also be useful.

Method 2 – Disable (or preferably uninstall) Software Before Upgrading

If you’re upgrading Windows 10 from Windows 7 or Windows 8.1, you might need to disable or uninstall the software first. First, try uninstalling your Antivirus utility before starting the upgrade. Restart a few times before starting the Windows 10 installation. If you’re upgrading using the Windows 10 update, make sure that you disconnect from your Wi-Fi or Internet LAN (Ethernet) connection as soon as the download reaches 100% before attempting to start the set-up. Other users also reported that the cause of the KMODE_EXCEPTION_NOT_HANDLED issue is BitDefender. If this is what happened in your case, it will show in the error message such as KMODE_EXCEPTION_NOT_HANDLED (bdselfpr.sys). Users reported that a common solution for this is renaming the file. In the case of BitDefender, try renaming it to bdselfpr.s__. However, make sure to do this cautiously. Sometimes, renaming a file will even do more damage than good.

Method 3 – Disable/Disconnect From Hardware

If you’re connected to any general USB devices (such a smart card reader), disable it. If your computer is connected to other external devices, disconnect all of them. Examples of this include gaming controllers, printers, external hard disk, USB keys, and other non-essential devices).

Method 4 – Other Troubleshooting Steps

Other troubleshooting steps include:

• Upgrade using an .ISO file, instead of directly upgrading from Windows Update. When you do this, make sure you’re disconnected from the Internet during installation. If the process started and you forgot to disconnected, it’s best to restart the installation.
• If you’re connected to a domain while trying to set up Windows 10, disconnect and use a local account.
• If you’re using a SCSI hard disk, connect a thumb drive with the drivers for your storage device. While Windows 10 is setting up, click on the Custom Advanced Option. Using the thumb drive, use the Load Driver command to load the SCSI drive.
• Another possible cause of this error is due to BIOS incompatibility. BIOS issues can be solved by upgrading your version of your system BIOS. If you don’t know how to do this, refer to your BIOS manufacturer’s website.

Method 5 – Use A Trusted Automated Tool

If you still experience the error after doing the methods above, you might want to try a powerful and trusted automated tool to fix the job.

Error Code 38 – What is it?

Error Code 38 is a device driver error that users encounter on any Windows 2000 operating system and its following versions.

It occurs when the peripheral device that you connect to your PC cannot be accessed due to an inability of the Windows system to acknowledge the driver as a previous record of the driver being loaded is found in its memory.

It is a common error that users come across and appears on your PC with the following message:

“Windows cannot load the device driver for this hardware because a previous instance of the device driver is still in memory. (Code 38)”

Solution

Error Causes

Error Code 38 is prompted when incomplete program files are left in the Windows system which damage or corrupt its files. There are various factors that contribute to this, some of which are:

• An incomplete program installation
• An incomplete program uninstallation
• Hardware is not removed properly
• System recovery from viruses
• An improper system shut down

The above triggers are very likely to create incomplete files within the Windows registry thereby leading to its damage and corruption.

This is especially true in the case of your PC when it has recovered from viruses when using anti-virus software. The anti-virus in its effort to remove the virus also could remove the files which contain them thereby increasing the risk of the error code.

These damaged files can severely impact the health of your PC and are imperative to fix it immediately to prevent further problems.

Further Information and Manual Repair

Although this error code may pose serious problems for your PC, thankfully, it is very similar to other PC driver errors and thus is an easy one to get rid of. Here are various methods that you can use to get your PC running smoothly again.

Method 1 – Restart your PC

The easiest method you can use to solve your PC error code is to simply restart your PC. It may be that the error prompted upon connecting the device you have connected is merely a temporary problem, and upon restart, will resume functioning smoothly.

Method 2 – Run the Troubleshooting Wizard

If restarting your PC does not help, you will have to find the exact nature of the problem by running the troubleshooting wizard for the device and then address the problem accordingly. To do this, proceed with the following steps:

1. Run Device Manager on your PC
2. Click on the program under the installed programs that is creating problems for you
3. Click on the ‘General’ Tab
4. Click ‘Troubleshoot’
5. Upon opening, the Troubleshooting Wizard will ask a series of questions regarding the error. Answer the questions and follow its directions for solving the error code.

After following the directions of the Troubleshooting wizard, make sure to restart your PC for the changes to take effect. Now check if your device is still causing problems.

Method 3 – Use System Restore

If the error persists, you can use system restore to eliminate the problem. Here is how to do so:

1. Log in using an Administrator account
2. Click ‘Start’ button and select All Programs > Accessories > System Tools > System Restore
3. Click ‘Restore my computer to an earlier time’ and click ‘Next’
4. Select the last Windows to restore point from the ‘On this list, click a restore point’ list, and click ‘Next’
5. Click ‘Next’ on the confirmation window to proceed
6. Restart your PC after restoration is complete

By restoring the system via a last saved system checkpoint, you can obtain undamaged Windows system files that can help resolve the error code.

Method 4 – Manually uninstall and reinstall the device driver

If using system restore does not work either, you may have to resort to manually uninstalling and then reinstalling the device driver causing the problem.

This would be necessary since the remaining incomplete files due to a partial removal or installation of programs are responsible for the error code. By uninstalling and reinstalling the device driver program, it would lead to the completion of the files.

You can do this by firstly logging in as Administrator and opening Device Manager. Select the device that is causing the problem and double click it; make sure that the peripheral is connected properly to the PC.

Upon opening, click on the ‘Driver’ tab and then select ‘Update Driver’. Make sure to refer to the system documentation that you received with your PC or computer to check for the motherboard details and driver specifics.

Method 5 – Use software to automatically download the driver

Manually uninstalling and reinstalling the driver will do the trick; however, it may be time-consuming especially when you would have to resort to your hardware user manual.

Using a program such as DriverFIX can save you a lot of time and frustration in having your device to work properly on your computer.

DriverFIX, with its user-friendly approach to help you fix your PC issues, comes with an integrated database that detects which drivers you need to reconfigure within just a few seconds and downloads it automatically.

It further ensures that your drivers are installed in their entirety leaving no room for any incomplete files to remain that create Error Code 38, or any other driver-related errors for that matter.

It also has the added advantage of being able to backup and restores your files should there be the slightest possibility of system file damage. DriverFIX is the answer to fixing your PC error codes accurately and quickly.

Click here to download DriverFIX to fix Error Code 38 quickly and effectively!

As you know, the Windows 10 operating system has support for a dedicated high-end graphics processor that brings in capabilities inside to support Graphics Cards from NVIDIA or AMD. This helps the operating system to function in a much better way by segregating the graphics-intensive operations from the CPU to a dedicated processor. However, there are times when it also experiences some issues that lead to some errors like the “Failed to create a graphics device” error. It is possible that your computer has more than one screen or graphics card which is why you’re getting this error. To fix it, you need to try reinstalling DirectX or reinstall the Graphics Card driver. You could also try to manually check the hardware or power cycle of your computer. To start troubleshooting the “Failed to create a graphics device” error, follow the given suggestions below.

Option 1 – Try running the DirectX Diagnostic Tool

Since the error has something to do with the DirectX Graphics APIs, you can run the DirectX Diagnostic tool to resolve the problem.

Option 2 – Try updating or re-installing DirectX

If the DirectX Diagnostic tool didn’t work, you can try to update or reinstall DirectX instead. This can help in fixing the problem because when you reinstall or update DirectX, it will replace the incompatible or corrupted components of DirectX from your computer.

Option 3 – Update or reinstall the Graphics card drivers

• First, boot your computer into Safe Mode.
• After that, tap the Win + R keys to launch Run.
• Type in MSC into the box and tap Enter or click OK to open the Device Manager.
• After that, a list of device drivers will be displayed. From there, look for the Display Adapters and click on them.
• After that, right-click on each entry under the Display Adapters and select the “Uninstall Device” option from the menu.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

Note: You also have the option to go directly to the website of your graphics card manufacturers like NVIDIA, Intel, or AMD and go to the section called Drivers then check if there’s a new available update – if there is, download and install it.

Option 4 – Try to physically check the hardware of your computer

You might also want to check the physical status of the hardware in your computer. You can clean the dust off the hardware components like the Graphics Card of the computer. In doing so, you have to use a small blower or you could also use a soft cloth and run the components gently. Make sure that you don’t damage any parts with moisture or cause harm to any circuits while you carry out this task.

Option 5 – Try to power cycle your computer

You could also try to power cycle your computer to fix the error. To do that, you have to turn off your computer in a way that the power is completely cut off and all the fresh configurations of files are loaded when your computer is booted up. The first thing you have to do is to shut down your computer and if you are using a laptop with a removable battery, you must remove the battery for a couple of minutes before you plug it back in and boot your laptop. On the other hand, if you are using a desktop computer, press and hold the power button until the CPU goes off and take out the power cable for a minute or so and then plug it back in. Boot your computer and see if the error has been resolved.

If you are trying to install Office but got an error saying, “Something went wrong, Sorry we ran into a problem” with error codes 12002-4, 12007-4, or 12152-4 instead, this indicates that you have a problem with your internet connection. Aside from internet connection issues, the problem could also be due to some programs that block the installation files to be downloaded so when they time out, you get these error codes. There are several options you can try to fix the 12002-4, 12007-4, or 12152-4 error codes. You can try to install Office offline or turn off the proxy server or VPN (if you’re using one). You can also try to temporarily disable your antivirus program or Firewall. Refer to the given potential fixes below to troubleshoot and fix the problem.

Option 1 – Try to install Office offline

The first thing you can do if you encounter the error codes 12002-4, 12007-4, or 12152-4 when installing Office is to download an offline copy of Office especially when you’re certain that your internet connection is slow. Once you’ve downloaded it, install it again. The offline installer will download both the 32 and 64-bit versions of Office. Keep in mind that you must download the correct version.

Option 2 – Disable the Proxy server

The first thing you can do is to try disabling the Proxy server as it might be the reason why you’re getting error 0x80244022 for Windows Updates. To disable the proxy server, refer to the steps below.

• Tap the Win + R keys to open the Run dialog box.
• Then type “inetcpl.cpl” in the field and hit Enter to pull up the Internet Properties.
• After that, go to the Connections tab and select the LAN settings.
• From there. Uncheck the “Use a Proxy Server” option for your LAN and then make sure that the “Automatically detect settings” option is checked.
• Now click the OK and the Apply buttons.
• Restart your PC.

Note: If you are using a third-party proxy service, you have to disable it. In addition, if you are also using a VPN, you can try to disable it as well.

Option 3 – Temporarily disable the Antivirus and Firewall

As mentioned earlier, the downloading of the installation files could be blocked by either the antivirus program or Firewall or it could be both especially when the link seems suspicious. To fix this problem, you have to disable both the antivirus like Windows Defender and the Firewall or any third-party software you might be used temporarily and then download the installation files again. Once the download is completed, make sure to turn on the antivirus program and the Firewall again. On the other hand, you can also try downloading in a different location which also means that you have to try a different network. It could be that the load on the current system is too high which is why it’s not able to offer enough bandwidth to download the installation files of Microsoft Office.

The new Windows 10 update has brought some fixes, improvements, and little things to personalize our computer more. One of these personalization updates we have received is that we can now finally change the color of our START menu and taskbar and it is easy as 1,2,3. In order to change and personalize your START menu and/or title bars all you have to do is click on your windows icon to bring the start menu up and then click on settings. Once you are in setting windows go to personalization settings. When the personalization setting opens go-to color tab on left and scroll down until you find 2 checkboxes under "show accent color on the following surfaces:" check ones you wish to apply the effect to and you are done. Now your START menu and/or title bars are using the color scheme of your choice.

The “Unknown Hard” error that keeps on appearing in Windows 10 can put users in an unpleasant situation. This kind of error leads to the freezing of the taskbar, blackening of the screen, and sudden disappearance of the icons on the Desktop. And each time you try to open Windows, the system will only give you an error message saying that it’s a critical error and some applications like Start and Cortana won’t work. Upon analysis, it seems that the “sihost.exe” is not responding and that it is the one that’s causing the c000021a Unknown Hard error to pop up. Sihost.exe files represent the Shell Infrastructure Host which is an essential component in the Windows operating system. The Windows Shell Infrastructure Host is primarily responsible for handling some graphical elements of the operating system interface such as the Start menu and the taskbar transparency. And so if the Shell Infrastructure or Sihost.exe has stopped, has been removed, or corrupted, you will most likely have issues with the overall functionality of the Windows operating system and you’ll get the Unknown Hard error In addition, the ctfmom.exe Unknown Hard error may also occur due to incompatible drivers installed on your PC. Ctfmom is a process that identifies inputs such as handwriting, languages, and many more. It’s the one that controls the functions of background behavior. To resolve this issue, you need to first try to identify which application is the one that’s running the sihost.exe file. And if needed, you need to either update or reinstall or completely uninstall the problematic application.

Option 1 – Try to run the System File Checker

The SFC Scan or System File Checker, us a built-in utility in Microsoft Windows that can be found in the C:\Windows\System32 folder. This tool allows users to scan and restore any corrupted system files in Windows that might be causing the Unknown Hard error to appear. Before you use this tool, make sure to find out whether the sihost.exe on your computer is a Trojan that you have to remove or if it’s a file that belongs to a trusted Windows application. Once you have that sorted out, follow the steps below.

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

Option 2 – Try to use System Restore

You can also try using System Restore. This is one of the ways you can use it to back up your PC. Since restore points are created automatically each week by System Restore, you can use System Restore to restore your computer back to an earlier good point in time.

Option 3 – Try to troubleshoot the error in a Clean Boot State

Putting your PC in a Clean Boot state can help you diagnose and troubleshoot the issues in your system. During this state, you can start the system with a minimum number of drivers and startup programs that will surely help you in isolating the root cause of the Unknown Hard Error.

• Log onto your PC as an administrator.
• Type in MSConfig in the Start Search to open the System Configuration utility.
• From there, go to the General tab and click “Selective startup”.
• Clear the “Load Startup items” checkbox and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
• Next, click the Services tab and select the “Hide All Microsoft Services” checkbox.
• Click Disable all.
• Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)

After putting your PC in a Clean Boot State, try creating a system restore point and see if the problem still occurs. Clean Boot troubleshooting is designed to help you isolate the problem. For you to execute a clean boot troubleshooting, you must do a couple of actions (the steps are given above) and then restart your PC after every action. You might have to disable one third-party app after the other to really isolate the issue. And once you’ve narrowed down the problem, you can either disable the third-party app that’s causing the problem or remove it. Note that you must switch your PC back into the Normal Startup mode after you’re done troubleshooting the problem. Here’s how you can do it:

• From the “Start” menu, go to System Configuration.
• After that, switch to the General tab and click the option for “Normal Startup”.
• Next, go to the Services tab and clear the checkbox for “Hide all Microsoft services”.
• Then find and click “Enable all” and if prompted, you have to confirm.
• Afterward, go to the Task Manager and enable all the Startup programs and confirm the action.
• Restart your PC when prompted.