How to Fix Error Code 22

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If you got the FAULTY_HARDWARE_CORRUPTED_PAGE Blue Screen error on your Windows 10 computer then it is most likely caused by various factors. It could be caused by an incomplete installation or uninstallation of some applications or program, or it could also be caused by some exploit that intervenes with the normal functioning of the computer, as well as bad sectors on the hard disk, damaged system files, malfunctioned system drivers, modified Windows Registry files, or a Blue Screen occurrence during a Windows Update and many more. Getting this bug check means that a single-bit error was found on this page. It also indicates that this is a hardware memory error and to resolve it, you need to follow the suggestions laid out below but before that, it is recommended for you to create a System Restore Point first so that if anything goes wrong, you can always go back to the previous state.

Option 1 – Run a Memory Check to test RAM

Since the problem might have something to do with hardware memory, you need to test RAM by running a Memory Check using the Windows Memory Diagnostic. Refer to these steps to do so.

• Tap the Win + R keys to open the Run dialog box.
• Then type “mdsched.exe” in the field and hit Enter to open the Windows Memory Diagnostic.
• After that, the Windows Memory Diagnostic will give out two options such as:

1. Restart now and check for problems (recommended)
2. Check for problems the next time I start my computer

• Select any of the given options. After that, your computer will restart and check for memory-based issues upon the restart. If there are any issues, it will automatically them.

Option 2 – Run the System File Checker

System File Checker or 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 that might be the cause why you’re getting the FAULTY_HARDWARE_CORRUPTED_PAGE Blue Screen error. 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.

Option 3 – Check for conflicting or incompatible programs by putting your PC in a Clean Boot state

As mentioned, the FAULTY_HARDWARE_CORRUPTED_PAGE Blue Screen error might be caused by some problematic programs that clash with your existing operating system. Several users reported that numerous programs that are supposedly designed to enhance computer performance are causing conflict in the system instead. To identify which program is causing the problem, you need to put your computer in a Clean Boot State. To do so, follow the steps below.

• 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.)
• From there, start to isolate the problem by checking which one of the programs you installed recently is the root cause of the problem.

Option 4 – Update or rollback drivers

If the first few options didn’t work for you, then it’s time to either update or roll back the device drivers. It is most likely that after you updated your Windows computer that your driver also needs a refresh. On the other hand, if you have just updated your device drivers then you need to roll back the drivers to their previous versions. Whichever applies to you, refer to the steps below.

• Open the Devices Manager from the Win X Menu.
• Then locate the device drivers and right-click on them to open the Properties.
• After that, switch to the Driver tab and click on the Uninstall Device button.
• Follow the screen option to completely uninstall it.
• Finally, restart your computer. It will just reinstall the device drivers automatically.

Note: You can install a dedicated driver on your computer in case you have it or you could also look for it directly from the website of the manufacturer.

Isn’t it annoying when you get an error message pop up stating ‘Cannot find propsys.dll” or “propsys.dll not found” when you start your computer or open a particular program? The propsys.dll file is crucial to the Windows operating system. This file is located in one of the following locations: "C:\Windows", C:\Program Files, C:\WINDOWS\system32, or C:\Program Files\Common Files". And the propsys.dll error indicates that the propsys digital library file is damaged and corrupt. The propsys.dll error may lead to a very unstable operating system. It may also hamper your ability to access many programs on your computer, lead to program and system crash and slow down the system’s performance. Therefore, to avoid these system threats, it is advisable to fix the error immediately.

Solution

Error Causes

The common causes of propsys.dll file error are:

• Registry problem
• The propsys.dll file is damaged due to a virus or spyware
• Improper software removal
• Hardware Failure

The propsys.dll error message is displayed in either of the following forms:

• Propsys.dll not found
• Cannot find [Path]propsys.dll
• This application failed to start because propsys.dll was not found. Reinstalling the application may fix this problem
• The propsys.dll file is missing

Further Information and Manual Repair

There are many ways to fix the propsys.dll error. However, for optimum results from the fix, you must first identify the cause of the error and then choose the solution accordingly.

• Recommended Solution for Registry Issue

If you use your system daily the resulting wasted/invalid/junk entries may dilate the registries. This can result in registry malfunctioning which may result in a propsys.dll error on your screen. When this happens, it is advisable to use a registry cleaner to fix the problem. Registry cleaner helps clean up the junk entries and repairing the corrupted registries. For this, you will first have to download a registry cleaner repair tool. Download and install the software on your computer. After downloading it, click the start scan button to run. This helps scan and diagnose system errors on your computer in seconds. Once the scanning is complete, click on the fix button to repair the registry problem.

• Recommended Solution for File Damage and Corruption

Use the ‘System Restore’ option to restore corrupt and damaged files.  The ‘System Restore’ function will help you get a fresh copy back and simultaneously help fix the error. Here’s how to use and access the ‘System Restore’ function on your computer: Simply go to the start menu and in the search box type restore. Once you type, it will show you the system restore option. Now select ‘choose a different restore point’. After this, you will be presented with a list of restore points. Choose a point that you believe happened before the propsys.dll error. Confirm your selection and restart. Another alternative solution for file damage is to run a virus scan of your entire system; the damage could be related to a virus or malware infection.

• Recommended Solution for Hardware Failure

If a propsys.dll error occurs due to hardware failure, then it is advisable to update the drivers for hardware devices that you think are related to propsys.dll. For example, if you receive the propsys.dll error when you play a 3D video game, then try updating the driver for your video card.

All malware is detrimental and the magnitude of the damage will vary greatly depending on the type of infection. Some malware variants modify internet browser settings by adding a proxy server or modify the PC's DNS settings. When this happens, you'll be unable to visit certain or all the sites, and therefore not able to download or install the required security software to clear out the computer malware. If you’re reading this article, chances are, you’re stuck with a virus infection that is preventing you from downloading and/or installing the Safebytes Anti-Malware program on your computer. Refer to the instructions below to remove malware through alternate methods.

Method 1: Install Anti-Malware in Safe Mode with Networking

If the malware is set to load automatically when Microsoft Windows starts, entering safe mode may block the attempt. Since only the minimal applications and services start-up in safe mode, there are rarely any reasons for conflicts to happen. You will need to do the following to remove malware in Safe mode.

• 1) Tap the F8 key continuously as soon as your computer boots, however, before the large Windows logo or black screen with white texts come up. This would invoke the Advanced Boot Options menu.
• 2) Choose Safe Mode with Networking using arrow keys and press Enter.
• 3) When you are into this mode, you will have access to the internet once again. Now, utilize your web browser normally and download Safebytes Anti-Malware.
• 4) After installation, do a complete scan and allow the software to get rid of the threats it detects.

Method 2: Utilize An Alternate Internet Browser to Download Anti-Malware Software

Malicious program code may exploit vulnerabilities in a specific web browser and block access to all antivirus software sites. If you suspect that your Internet Explorer has been hijacked by computer malware or otherwise compromised by cybercriminals, the most effective plan of action is to switch to an alternate web browser such as Chrome, Firefox, or Safari to download your chosen security program - Safebytes Anti-Malware.

Download SafeBytes Anti-Malware for Malware Removal

Method 3: Install and Run Anti-Malware From a USB Drive

To effectively remove the malware, you might want to approach the problem of installing an antivirus software program on the affected computer from a different angle. Adopt these measures to employ a flash drive to fix your infected computer.

• 1) Use another malware-free PC to download Safebytes Anti-Malware.
• 2) Plug the thumb drive into the uninfected computer.
• 3) Double click on the executable file to open the installation wizard.
• 4) Choose the drive letter of the USB drive as the place when the wizard asks you exactly where you would like to install the anti-virus. Follow activation instructions.
• 5) Now, transfer the thumb drive to the infected computer.
• 6) Double-click the antivirus program EXE file on the USB flash drive.
• 7) Click on the “Scan Now” button to start the malware scan.

If no other method of downloading and installing the antivirus software works, then you've no other option than to hit the last resort: a full Windows reinstallation, the only approach known to have a 100% rate of success at virus removal.

If you suddenly encounter a PNP_DETECTED_FATAL_ERROR Blue Screen error, then this post can help you out. The PNP_DETECTED_FATAL_ERROR BSOD usually occurs when any new hardware that is mostly the Plug and Play type is attached. In such cases, when the device is plugged, and the driver for that device crashes or isn’t found or is not compatible, you will most likely encounter this particular BSOD error. There are several error codes that come under this category, some of them are 0x000000CA (0x01681690, 0xEA96A7BE, 0x938A81AD, 0xF8362881. This BSOD error can also occur at any time. However, the only constant thing here is when you plug a PNP device like earphones, microphones, USB drives, and many more. The PNP_DETECTED_FATAL_ERROR bug check has a value of 0x000000CA which indicates that the Plug and Play Manager encountered some severe error which is most likely have something to do with a problematic Plug and Play driver. To fix this error, here are some possible solutions that could help.

Option 1 – Run the Blue Screen Troubleshooter

The Blue Screen troubleshooter is a built-in tool in Windows 10 that helps users in fixing BSOD errors like PNP_DETECTED_FATAL_ERROR Blue Screen error. It can be found on the Settings Troubleshooters page. To use it, refer to these steps:

• Tap the Win + I keys to open the Settings panel.
• Then go to Update & Security > Troubleshoot.
• From there, look for the option called “Blue Screen” on your right-hand side and then click the “Run the troubleshooter” button to run the Blue Screen Troubleshooter and then follow the next on-screen options. Note that you might have to boot your PC into Safe Mode.

Option 2 – Try disabling or removing newly installed hardware

In this option, you will have to disable or remove the hardware you’ve just installed recently since external devices could be the one that’s causing the Blue Screen of Death error to appear. To do that, just disconnect any external device that’s connected to your computer physically and then check if it fixes the PNP_DETECTED_FATAL_ERROR Blue Screen error.

Option 3 – Try disabling BIOS Memory options namely Caching Shadowing

Disabling the BIOS Memory options such as Caching and Shadowing can help you in fixing the PNP_DETECTED_FATAL_ERROR Blue Screen error. All you have to do is enter the BIOS first and then use the Arrow and Enter keys to select your choices. And if you can’t seem to find it, look for specific instructions from your OEM or you could also look out for instructions from the manufacturer of your motherboard.

Option 4 – Try to run the CHKDSK utility

Running the CHKDSK utility might also help you resolve the PNP_DETECTED_FATAL_ERROR Blue Screen error. If your hard drive has issues with integrity, the update will really fail as the system will think that it’s not healthy and that’s where the CHKDSK utility comes in. The CHKDSK utility repairs hard drive errors that might be causing the problem.

• Open Command Prompt with admin privileges.
• After opening Command Prompt, execute the following command and hit Enter:

chkdsk /f /r

• Wait for the process to be completed and then restart your computer.

Option 5 – Try to uninstall programs you’ve installed recently

Chances are, some programs that you just installed might be the one that’s causing the BSOD error. Thus, you need to uninstall the program to resolve the problem.

• In the search box, type in “control” and then click on Control Panel (desktop app) among the search results.
• After that, select Programs and Features from the list which will give you a list of all the programs installed on your computer.
• From there, look for the concerned program and select it and then uninstall it.

Option 6 – Update the Device drivers

• Tap the Win + R keys to launch Run.
• Type in devmgmt.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. Look for the device driver you and then select either “Update driver” or “Uninstall device”. And if you find any “Unknown device”, you need to update it as well.
• Select the “Search automatically for updated driver software” option and then follow the instructions to complete the process.
• If you have chosen to uninstall the driver, follow the screen options to complete the process and then restart your PC.
• Connect the device and Scan for hardware changes – you can see this option under Device Manager > Action.

Option 7 – Perform a System Restore

Performing System Restore might help you in fixing the PNP_DETECTED_FATAL_ERROR Blue Screen error. You can do this option either by booting into Safe Mode or in System Restore. If you are already in the Advanced Startup Options, just directly select System Restore and proceed with the next steps. And if you have just booted your PC into Safe Mode, refer to the steps below.

• Tap the Win + R keys to open the Run dialog box.
• After that, type in “sysdm.cpl” in the field and tap Enter.
• Next, go to the System Protection tab then click the System Restore button. This will open a new window where you have to select your preferred System Restore point.
• After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

Magcore.dll Error - What is it?

Magcore.dll is a type of Dynamic Link Library. This file is associated with software developed by ArcSoft, a renowned multimedia application developer. Magcore.dll consists of small programs that help load and run software developed by ArcSoft on your system smoothly. This file virtually comes into function when you use certain audio and video features incorporated in ArcSoft programs for example ArcSoft Media converter. However, you may experience Magcore.dll error code on when this DLL file fails to run and load programs. The error may hamper your ability to access ArcSoft programs on your system and cause you a great deal of inconvenience. Magcore.dll error is often displayed in any one of the following formats:

“The file magcore.dll is missing” “MagCore.dll cannot be found” "Cannot find [PATH]magcore.dll" “This application has failed to start because MagCore.dll was not found. Reinstalling the application may fix the error.”

Solution

Error Causes

This DLL file is known to be prone to errors. MagCore.dll error occurs due to several reasons such as:

• Missing or damaged MagCore.dll file
• Hardware failure
• Viral infection
• Registry issues

If you experience MagCore.dll error on your system, it is advisable to fix it right away. Though it is not fatal, but if you don’t repair it, you may not be able to access practically all ArcSoft programs on your PC.

Further Information and Manual Repair

Here are some of the efficient and easy manual methods to resolve error MagCore.dll on your PC:

Method 1 - Scan and Remove Malware

MagCore.dll error can be triggered by viral or other malware infection. Malware can easily damage DLL files and masquerade as the MagCore.dll file. To resolve, simply download a powerful antivirus on your system. Run it to scan your entire PC for viruses and remove them right away.

Method 2 - Update the Drivers for Hardware Devices

As we mentioned above the error may be related to hardware failure too. In times like these, it is advisable to update the drivers for hardware devices. For example if you try to play a 3D video game and it fails to run showing you MagCore.dll error message, then simply try updating the drivers for your video card. Drivers can be updated in Windows by using a driver update wizard from within Device Manager.

Method 3 - Use System Restore to Undo Recent System Changes

After trying method 1 and 2, if the error code still persists, then it is opt for method 3. Use Windows System Restore utility to undo recent system changes and bring your PC to its normal previous condition before the error occurred. To restore, simply go to the start menu, type System Restore. Now click on System Restore and just pick a point in the past called a restore point to return important Windows files and settings.

Method 4 - Repair the Registry

If the underlying cause of the MagCore.dll error code is related to registry issues, then simply repair the registry. You can fix it manually but it is a little complicated and time-consuming. You may find it difficult if you are not a technical whiz. Nonetheless to resolve and repair it in seconds, download Restoro. This is a powerful and a user-friendly PC Fixer embedded with a registry cleaner and several other highly functional scanners. Run it to scan your entire PC for registry problems. The registry cleaner utility removes all bad and invalid entries, cleans up the registry space, and repairs the damaged files. Click here to download Restoro and repair MagCore.dll error code on your PC.

Error code 0Xc004F074 - What is it?

Did you previously use Windows 7 or 8 but decided to run with the latest Windows 0S, Windows 10? An early error message encountered was activation error code 0Xc004F074. Error code 0Xc004F074 is manifested when the user fails to activate Windows directly after the installation of Windows 10. This occurs if the previous operating system on your computer was Key Management Service (KMS) activated.

The KMT provides a more seamless operation when users are activating volume license editions of Microsoft Windows and Office. This process tends to be clear to end-users of the system.

Symptoms of error code 0Xc004F074 include:

• Windows is unable to reach your company’s activation service.
• The Key Management Service is unavailable.

Solution

Error Causes

Various factors might incite error code 0Xc004F074. A primary cause is a discrepancy or difference between the KMS client and the KMS host machine. The host computer could possibly be operating a Windows Server 2003 or Windows Server 2008, while the client runs on OS Windows 7 or Windows Server 2008 R2. To supplement, the computer’s time might be a contributing factor. The time on the host machine and client might show a difference (Usually the host time exceeds 4 hours).

Further Information and Manual Repair

To rectify error code 0Xc004F074, users are advised to try various methods. These methods include:

1. Method 1: Update Your KMS Host 9 (Windows Server 2003)

Are you running later versions of Windows Server? Use an update that fixes or installs KMS on your computer. The update is available on Microsoft’s website. Keep clearly in mind that the update is only for Windows Server 2013 Service Pack 1 and later versions of Windows Server 2003.

2. Method 2: Update Your KMS Host 9 (Windows Server 2008)

This step is similar to the aforementioned. However, it applies to Windows Vista and Windows Server 2008. This ensures the service is extended to Windows 7 and Windows Server 2008 R2.

3. Method 3: Update the Time

It was previously mentioned that the time reflected on the KMS host and client might cause error code 0Xc004F074 to manifest. A simple fix to adhere to is to always ensure that the time between both is updated. To Resync the time on the client, execute the following command.

w32tm /resync

4. Method 4: Uninstall the Existing KMS

For this method to be successfully deployed, you’ll need to have in your possession an activation key or KMSpico Key. As you cannot apply the new key with the existing one, remove or uninstall the initial key. To perform this step, open the command prompt. This should be done while the computer is in admin mode. Then, run the command

(slmgr.vbs /dlv)

It should be executed without the brackets and before you have removed the existing key.

After executing the command, you’ll encounter the description:

Windows(R) Operating System, VOLUME_KMS_WS12_R2 channel

Move along with the process by applying the slmgr.vbs /upk to uninstall the existing KMS key.

After the old key is uninstalled, you’re ready to apply the following:

slmgr.vbs /ipk <NewKMSProductKey>

To check if things are in place and complete the process, follow the steps below: PC Settings >Update and Security > Activation

5. Method 5: Download an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 8 and other related issues when they do arise, download and install a powerful automated tool.

Error Code 0x80070570 - What is it?

Error Code 0x80070570 is a common Windows 10 error code that generally is seen by users who are attempting to install a new version of the operating system. While it is most often associated with Windows 10, variations on this same error code have been present in previous versions of the operating system, going all the way back to Windows 7.

Common symptoms include:

• Inability to run through the installation process to completion when attempting to install a new version of the operating system
• Error message regarding corrupt or missing files

While it is frustrating to encounter an error like Error Code 0x80070570 as you try to install a new operating system version on your device, there are several methods that can be used to try to resolve the issue. If you do not feel like you have the skill or knowledge necessary to successfully apply the steps below, be sure to get in touch with a trusted computer repair technician that is competent in the repair of Windows 10 errors.

Solution

Error Causes

In some cases, Error Code 0x80070570 arises erroneously when the system isn’t able to find a particular file that it needs. Other times, it happens when there is a conflict with the antivirus software that you are running and the installation software. Finally, there may be a faulty source of RAM in your computer that needs to be removed before the installation can be completed.

Regardless of what you believe to be the cause behind the error code, there are at least two different methods that you can use to try to resolve Error Code 0x80070570 on your device. The first is fairly simple and easy to follow, while the second requires a little bit more knowledge of your hardware in order to complete it successfully.

Further Information and Manual Repair

There are two common ways that users can attempt to get around Error Code 0x80070570 on their devices. Each requires a little more skill and technical knowledge than the last. If you don’t feel like you have the skill, time, or ability to invest in the methods below, be sure to get in touch with a Windows repair technician who can help you to complete the necessary steps in the right ways.

Here are the best ways to attempt to resolve Error Code 0x80070570 on your Windows device:

Method One:  Reattempt Installation

In some cases, when Error Code 0x80070570 appears on your computer, you can simply click on the OK button and then go back to the screen immediately proceeding where your installation has left off, choosing to restart the process of installation. For some users, repeating this method at least four times has allowed them to bypass the error without undertaking more serious and time-consuming methods to resolve the issue at hand.

Method Two:  Check Your Various Sources of RAM

If you have more than one source of RAM in your computer, first remove one of the sources, then re-attempt installation. If you are still encountering Error Code 0x80070570 after removing one of the sources, continue to remove each until you are down to a single source, then trade that last source for one of the ones that have been pulled.

If you have a bad source of RAM, this can help you to figure out which input is causing the error to appear and to address the problem appropriately. Once you have determined which specific source is causing the problem, you can reboot your computer and attempt to run the installation process one more time.

If your RAM sources are not specifically causing the issue, you may still need to run diagnostics tests on your hardware to identify the source of the problem at hand.

Method Three: Use An Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 10 and other related issues when they do arise, download and install a powerful automated tool.

Error Code  0x80070490 - What is it?

Error code 0x80070490 occurs in versions of Windows including Windows 8 or 8.1 and Windows 7 or Windows Vista. This error often arises when users attempt to install updates via Windows Update or Microsoft Update.

The main reason for the error relates to the Component-Based Servicing (CBS) manifest which has become damaged. When the error occurs, the Windows device is unable to successfully install updates.

Solution

Error Causes

Error code 0x80070490 might appear for various reasons but is most prominent in the following cases:

• Attempts to install Windows 8 or 8.1
• A corrupted Component-Based Servicing (CBS)

Further Information and Manual Repair

The solutions for error code 0x80070490 vary so users may need to attempt each solution to find the best results.

1. Repair Corrupted Windows Files with System File Checker

The System File Checker (SFC.exe) is a Windows-based utility that enables users to check and repair corrupted or damaged system files. It can also restore missing systems files which can be the cause of errors such as error code 0x80070490.

To repair files, begin scan by swiping the right edge of the screen then opening the search box. Type Command Prompt, right-click this option, then select Run as Administrator. Once the scan begins, wait for the process to be completed then restart your device. Check if the error is resolved by reattempting updates. If error code 0x80070490 in Windows 8 or 8.1 persists on your device, proceed to the solution below.

2. Perform Clean Boot

A clean boot is one of the best ways to reduce conflict among files – an issue that may arise whenever users update, install or run programs on their Windows device.

To run a clean boot, your device reboots using limited drives and programs. The process allows you to identify which conflict among programs is causing errors on your Windows device.

You can access the clean boot tool by entering msconfig in the search box. Select Services, then System Configuration. Check the Hide all Microsoft services checkbox then select Disable all. Next, go to the Startup tab, click and open Task Manager. After selecting the Startup tab, make sure you right-click each startup program. Click Disable from the context menu then close Task Manager when done. Select OK on the System Configuration menu then restart your machine to clean boot Windows 8 or 8.1.

If the clean boot successfully identifies and resolves issues with corrupted files, you will be able to access updates using Windows Update or Microsoft Update. Error code 0x80070490 will no longer occur. But if that proves unsuccessful, other options are available below including running Windows Update Troubleshooter.

3. Run Windows Update Troubleshooter

This method can provide a simple solution for users as it verifies whether your Internet connection, network adapter and Windows Update services are functioning properly. However, if you are uncertain as to whether you will be able to troubleshoot, seek assistance from a qualified Microsoft technician.

To run Windows Update Troubleshooter, simply download from Microsoft’s website. Be sure you are downloading the tool recommended for your operating system, in this case Windows 8 or 8.1. After you download Windows Update Troubleshooter, run it to enable the tool to check for and resolve update issues on your device.

4. Use DSIM or System Update Readiness Tool

The System Readiness Tool or DSIM is another method you can use to correct issues related to error code 0x80070490. This tool checks problems on your system that might prevent your computer from performing Windows updates including issues related to damaged system files.

Once you download and install this tool, it will be able to run automatically. The process may be technical, however, requiring specialized knowledge to successfully download and run the tool. Consider getting assistance from an IT professional in this case. Also, check Microsoft's online resources to download the tool.

5. Use an Automated Tool

Having an automated tool at hand will enable users to always be prepared. Download a powerful automated utility tool to provide solutions whenever error codes or other problems affect your Windows 8 device.

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.