Microsoft Windows 11 limitations surfacing

As you know, Windows Updates are essential for your operating system as it keeps it protected from potential threats, fixes bugs and improves your experience in using Windows 10. However, there are instances when Windows Updates also cause errors and one of them is the Windows Update Error 0x8024000B. One of the causes of this particular Windows Update error is that Windows was not able to read the Update Manifest file which is needed to install the Windows Updates. This means that the operation was canceled by either the service or the user. On the other hand, this error could also occur if you are not able to filter the results. When you encounter this error, you will see an error message that says, “WU_E_CALL_CANCELLED: Operation was canceled”. This indicates that the operation was canceled by the operating system itself. To resolve the Windows Update Error 0x8024000B, here are some suggestions you need to check out.

Option 1 – Try to run the Cleanup (Decline) Superseded updates PowerShell script

The first thing you can do to fix the Windows Update Error 0x8024000B is to run the Cleanup (Decline) Superseded updates PowerShell script. This is actually an easy fix since all you have to do is download and run it from the Microsoft Technet site. Once you’re done downloading and running the file, restart your computer and see if the error is fixed or not.

Option 2 – Try to rename the Spupdsvc.exe file

If the first option didn’t work, you can try renaming the Spupdsvc.exe file which is one of the reasons why you’re getting the Windows Update Error 0x8024000B.

• First, tap the Win + R keys to launch the Run utility.
• Next, type the following command and hit Enter to execute it in cmd:

 /c ren %systemroot%System32Spupdsvc.exe Spupdsvc.old

• The command you entered will rename the troublesome “Spupdsvc(.)exe” file to “Spupdsvc(.)old”.
• Now restart your computer after the command has been executed.

Option 3 – Try to restart various Windows Update-related services and components

You could also try to restart some Windows Update-related services to resolve the Windows Update error. Refer to the following steps to do so:

• Tap the Win + X key combination and select Command Prompt (Admin) to open Command Prompt with admin privileges.
• After opening Command Prompt, copy and paste each one of the commands listed below one by one and tap Enter right after you enter each command.
  • net stop wuauserv
  • net stop bits
  • net stop appidsvc
  • ren %systemroot%SoftwareDistribution SoftwareDistribution.bak
  • ren %systemroot%system32catroot2 catroot2.bak
• Once you’ve entered all the commands given above, they will stop all the Windows Update services that are running on your computer as well as clear the SoftwareDistribution folder, and reset the Catroot2 folder. Now you have to start all these Windows Update services you’ve just stopped by executing the following commands:
  • net start wuauserv
  • net start bits
  • net start appidsvc
  • net start cryptsvc
• After that, restart your computer and try to run the setup again, and see if the error is now fixed.

Option 4 – Try to run the Windows Update Troubleshooter

You should also try to run the built-in Windows Update troubleshooter as it could help you resolve the Windows Update Error 0x8024000B. To run it refer to these steps:

• Go to Settings and then click on Windows Update from the given menu.
• Next, click on the Troubleshoot option and select Windows Update from the given options to run the Windows Update troubleshooter.
• After that, follow the next on-screen instructions and wait until the process is completed, and check if the Windows Update Error 0x8024000B is fixed or not.

If you are trying to run or starting a program on your Windows 10 computer and you suddenly get an error message saying, “Error 1061 The service cannot accept control messages at this time”, read on as this post will show you what you can do to fix the problem. This kind of error pops up since the Application Information Service does not respond to the requests to raise applications to Administrator in Windows 10 like the Task Manager, Service updates, and so on. Thus, you won’t be able to run or open apps and will only get stuck with this error. The “Error 1061 The service cannot accept control messages at this time” message is a type of network error that typically occurs when there is a temporary mismatch between the requested control and the state of the service to be controlled. It’s most likely that the service is in a state of start-pending, stop-pending, stopped or it may already be used by another user which explains why this error message suddenly appears. You can encounter this error message on any Windows operation. Here are some of the most common occurrences:

• Debugging a Windows service
• Starting Task Manager
• Starting Registry Editor
• Starting Firewall
• Starting services.msc
• Starting dsm.exe
• Updating services
• Asking for file permissions, etc.

According to Microsoft MSDN, the error occurs because:

“There is a temporary mismatch between the requested control and the state of the service to be controlled. The service may be in a state of start-pending, stop-pending, or stopped. Wait a few minutes, then retry your operation.” If after a few minutes, the error still appears, then you may have to follow the options prepared below.

Option 1 – Try to restart the Credential Manager Service

• Go to the Start menu.
• Then type in “services” in the search box.
• From the search results, right-click on “Services” and select the “Run as Administrator” option.
• Next, look for the Credential Manager Service in the Services window.
• Once you found it, double-click on it to open its Properties. From there, you need to click on the Stop button.
• After that, set the Credential Manager Service to “Automatic” and click on the Start button to restart it.

Option 2 – Try to start the Application Information Service

You can also try starting the Application Information Service to fix the “Error 1061 The service cannot accept control messages at this time”. Just open the Windows Services Manager and make sure that Application Information Service is Started. And if you find that it’s already started, you need to restart it.

Option 3 – Try killing the IIS Worker Process via Task Manager

• Tap the Ctrl + Alt + Del keys and select the Task Manager.
• Next, click on More details to expand the Task Manager and then look for the IIS Worker Process entry which should be displayed in the list under the Processes tab. From there, you can see it in the Background processes. Once you find it, kill its process.
• You can also try to look for the “w3wp.exe” entries and end its process. if you find many entries, right-click on some of them and select the End task option from the context menu.
• Now restart your PC. That should fix the problem.

As you know, Microsoft is consistent in pushing updates to its supported versions of the Windows operating systems in order to make it better and defend it from different kinds of vulnerabilities. And pushing billions of active Windows computers every now and then is really not an easy thing to do since it calls for a complex Windows Update delivery module. These complexities often give rise to various errors like the Windows Update error code 0x80004005. When you encounter this kind of Windows Update error, you will see the following error message on your screen:

“There were problems installing some updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help 0x80004005.”

This kind of Windows Update error occurs due to an issue while either installing or downloading an update. There are several ways you can fix the problem. You can try to replace the dpcdll.dll file, reset the Windows Update-related services, run the Windows Update troubleshooter or manually install the Windows Updates. For more details, check out the options given below.

Option 1 – Try to replace the DLL file with a trusted source

The first thing you can do is to replace the dpcdll.dll file with a trusted source.

• First, you need to get the new dpcdll.dll file from another computer with preferably the same file version number as your computer.
• After that, you need to boot your PC into Safe Mode and navigate to the paths listed below and then replace the file using a USB drive or other external storage devices.
  • For x86: This PC > C:/Windows/System32
  • For x64: This PC > C:/Windows/SysWOW64
• Next, type “cmd” in the Cortana search box and right-click on Command Prompt, and select “Run as administrator” to open it with administrator privileges.
• Now type the “regsvr32 dpcdll.dll” command and hit Enter.
• Restart your PC and check if the error is now fixed.

Option 2 – Try to reset the Windows Update components

If by any chance that the third option didn’t work, you can also try resetting the Windows Update components as it could also help you resolve the Windows Update error. How? Refer to the following steps:

• Open Command Prompt with admin privileges.
• After that, type each one of the following commands and hit Enter after you key in one after the other.
  • net stop wuauserv
  • net stop cryptsvc
  • net stop bits
  • net stop msiserver

Note: The commands you entered will stop the Windows Update components such as Windows Update service, Cryptographic services, BITS and MSI Installer.

• After disabling WU components, you need to rename both the SoftwareDistribution and Catroot2 folders. To do that, type each one of the following commands below and don’t forget to hit Enter after you type one command after the other.
  • ren C:WindowsSoftwareDistribution SoftwareDistribution.old
  • ren C:WindowsSystem32catroot2 Catroot2.old
• Next, restart the services you’ve stopped by entering another series of commands. Don’t forget to hit Enter after you key in one command after the other.
  • net start wuauserv
  • net start cryptsvc
  • net start bits
  • net start msiserver
• Close Command Prompt and reboot your PC.

Option 3 – Run the Windows Update Troubleshooter

You might also want to run the Windows Update Troubleshooter as it could also help in fixing Windows Update error 0x80004005. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 4 – Try downloading and installing the Windows Updates manually

Windows Update Error 0x80004005 might be due to a Windows Update that has failed. So if it is not a feature update and only a cumulative update, you can download the Windows Update and install it manually. But first, you need to find out which update has failed, and to do so, refer to the following steps:

• Go to Settings and from there go to Update and Security > View Update History.
• Next, check which particular update has failed. Note that Updates that have failed to install will be displayed under the Status column which has a label of “Failed”.
• After that, go to the Microsoft Download Center and look for that update using its KB number and once you find it, download and then install it manually.

Note: You can also use the Microsoft Update Catalog, a service from Microsoft that provides a list of software updates that can be distributed over a corporate network. With the help of this service, it can be easier for you to find Microsoft software updates, drivers as well as fixes.

PFN_LIST_CORRUPT Blue Screen - What is it?

PFN_LIST_CORRUPT is a blue screen of death error code. It occurs when the PFN (Page Frame Number) list becomes corrupt. The Page Frame Number is basically used by your hard drive to determine your location of each one of your files on the disk. This error may occur when starting up the program or while using it. Blue screen of death errors occurs without any warnings. The program disrupts all of a sudden and the computer screen turns blue.

Solution

Error Causes

PFN_LIST_CORRUPT Blue Screen error may occur due to multiple reasons. Some of the common reasons include:

• Hardware problems
• Device driver issues
• Registry problems
• Viral Infection

It is recommended to resolve the PFN_LIST_CORRUPT Blue Screen of Death error immediately without any delay virtually because this error can be quite fatal to your PC. It can pose serious threats to your system like system freeze, crash, failure, and valuable data loss. Furthermore, if the error is related to viral infection, it can expose you to privacy issues, data breaches, and cybercrime too.

Further Information and Manual Repair

This is a critical PC error but easy to resolve. You don’t need any technical expertise to fix this error on your PC. Here are some quick and easy methods to resolve PFN_LIST_CORRUPT Blue Screen error:

Method 1: Install Compatible Device Drivers

Sometimes when new hardware is added to the PC, you need to install updated versions of the device drivers to ensure there are no incompatibility issues. Incompatibility between the hardware and device drivers may generate PFN_LIST_CORRUPT Blue Screen of death error on your screen. To resolve, it is advisable to download and install the latest updated versions of the device drivers from the manufacturer’s website.

Method 2: Scan for Viruses

PFN_LIST_CORRUPT Blue Screen of Death error may occur due to viral infection too. Viruses and spyware enter your PC when you log on to unreliable websites and download programs from there or open phishing emails on your PC. These viruses corrupt and damage programs and files resulting in such errors. To fix the issue, you need to install a powerful antivirus and ensure all kinds of viruses and spyware are detected and removed from your system.

Method 3: Clean and Restore the Registry

PFN_LIST_CORRUPT Blue Screen error indicates poor PC maintenance. When you don’t clean and remove unnecessary and obsolete files like junk files, bad registry keys, cookies, internet history, temporary files, and invalid entries from the registry, the registry overloads and gets damaged. These files accumulate taking up a lot of disk space and also corrupt system files. If these files are not removed timely, it results in registry issues like a blue screen of death errors and run-time errors. To remove these files and clean the registry, you need to install a powerful registry cleaner. Whether the underlying cause for PFN_LIST_CORRUPT Blue Screen of Death error on your PC is viral infection or registry issues, to resolve the BSOD error code in seconds download Restoro. This is a cutting-edge and multi-functional PC fixer deployed with both an antivirus and a registry cleaner. Additional features include a system optimizer too. It is user-friendly and easy to operate. You can download it on all Windows versions without any hassle. It is safe and bug-free. The registry cleaner feature scans and removes all unnecessary files, cleans and repairs the registry while the antivirus utility simultaneously removes all kinds of malicious software including spyware, viruses, Trojans, and malware. Click here to download Restoro now and resolve the PFN_LIST_CORRUPT Blue Screen of Death error immediately!

MSI.chm error is a common Windows Error code that occurs when the Windows OS becomes overloaded with invalid system references.

Solution

Error Causes

The MSI.chm error is normally triggered by the following causes:

• Poor PC maintenance

You may experience the MSI.chm error if you don’t pay attention to its maintenance. This usually happens when you don’t run antivirus software or update programs and drivers frequently.

• Registry files get corrupt and damaged

This error may also occur when the registry files of your PC get corrupt and damaged. This normally happens due to continuous writing, editing and deleting of information from your PCs registry over time as programs are installed, modified and deleted. Other causes include: malware and system conflicts.

Further Information and Manual Repair

When you come across the MSI.chm error on your PC, it is advisable to repair it immediately without any delays. If you procrastinate in repairing this error, your PC is likely to be exposed to risks like:

• Slow PC performance
• System failure and crashes

Nonetheless, to resolve this error you don’t have to get the assistance of an IT professional. The MSI.chm is easy to repair and you can resolve it in no time even if you aren’t technically adept. Here are some of the best ways to repair the MSI.chm error on your PC successfully in the shortest time:-

Cause: Corrupt and Damaged Registry Files

Quick Fix: If you think the MSI.chm Windows error on your system is related to Windows registry issues, then the best way to resolve this error is to download and install a Registry cleaner tool.  A word of advice here is to always download such tools from a reliable and a trusted website. Once you download the Restoro, run it on your PC to scan for errors. The scanning will usually take a couple of minutes. So, it is advisable to be patient. After the scanning is complete, you will see a detailed scanning report highlighting the registry errors on your PC. Now to resolve the MSI.chm error that has occurred on your PC due to registry issues, click on the ‘Repair’ button to fix the error. Once the repairing process is complete, restart your PC. Restoro helps you not only fix the MSI.chm error but it also helps improve the speed of your PC, and protects it from failure and crashes.

Cause: Poor PC Maintenance

Quick Fix: If the cause of the MSI.chm error is poor PC maintenance, then the best way to resolve the error is to update the drivers. You can do this by installing the latest drivers for the devices that you think are now old and need to be updated. Here’s what you need to do: First find which devices don’t have drivers installed. For this go to the start menu and then click on the Control Panel. Now open the Device Manager. The Device Manager will list down all the devices that don’t have drivers installed with yellow exclamation point icons next to the device name. As for the updates, the general rule of thumb if the driver does not support the program you are trying to run, then this means that you probably need to update the driver to ensure compatibility. For example your video card driver does not support a newly launched game, then you definitely need a driver update to play the game on your PC. To install or update drivers on your PC, you can either get CDs from the market or you can download updated versions of the drivers from the main manufacturer’s website for free. You can also use automated solution for all of your driver issues: So, next time when you or your friends encounter this problem, try these quick fixes to repair the error without any hassle.

As you know, Excel sheet is frequently acclaimed as one of the most useful software that allows users to create spreadsheets, crunch numbers as well as prepare a business report. Usually, tapping the arrow keys to move from one cell to another. However, there are times when you might experience trouble in tapping them – for instance, they won’t work when you tap them. This kind of problem can be quite frustrating since no matter what you do, especially when you tap the arrow keys, instead of a single cell, it moves the entire spreadsheet. If you are one of the users who experience this problem, worry no more for this post will guide you on what you can do to fix it. When arrow keys won’t function as intended in Excel spreadsheets, it could be due to unintended behavior of the Scroll key or it could be related to some issues with the keyboard driver. Whatever the cause is, here are some suggestions you can check out to fix it.

Option 1 – Try to disable the Scroll Lock

The first thing you can do to fix this problem with arrow keys is to disable the Scroll Lock. Although doing this is easy, newer laptops don’t actually come with it so if your keyboard does not come with a scroll key, all you have to do is tap the Fn key and disable Scroll Lock. Aside from that, you could also use the on-screen keyboard to turn off the Scroll Lock. You will see its status on the Excel sheet which will help you to double-check. Moreover, you could also tap the Shift + F14 keys to toggle off the Scroll Lock. To use the on-screen keyboard to turn off Scroll Lock, follow the steps below.

• Tap the Windows key and type “on-screen keyboard” and then tap Enter.
• Once the on-screen keyboard is opened, you should see that the Scroll Lock is on the “On” position since the ScrLk keys are in blue.
• Like pointed out earlier, you can utilize the Scroll Lock indicator located in the status bar as well as disable or enable the scroll key by using this feature on Microsoft Excel.

Option 2 – Try turning on the Sticky key

If disabling the Scroll Lock did not fix the problem, you can try turning on the Sticky Key instead. A lot of users reported that this option fixed the problem for them. So you should try to turn on the Sticky key and to do that, follow the steps below.

• First, type “control panel” in the Start Search and click on Control Panel from the search results.
• Next, select the “Turn On Sticky Keys” option and click on OK.
• After that, go back and uncheck the “Turn On Sticky Keys” option. This should fix the malfunctioning arrow keys on Excel.

Option 3 – Try running the Hardware and Devices Troubleshooter

The first thing you can do to fix the problem is by running the Hardware Troubleshooter. Although it won’t make much of a difference, there’s still a possibility that it could automatically fix the problem with these function keys. To use it, refer to these steps:

• The first thing you need to do is click on Start and then on the gear-like icon to pull up the window for Settings.
• After opening Settings, look for the Update and Security option and select it.
• From there, go to the Troubleshoot option located on the left-hand side of the list.
• Next, select Hardware and Devices from the list and open the Troubleshooter and run it. Once it is doing its job, wait for it to complete the process and then restart the system.
• After the system restarts, check if the problem’s now fixed. If not, refer to the next option given below.

Option 4 – Update the keyboard driver

You can also update the keyboard driver to fix the problem. There are cases when an outdated or corrupted driver can fix the problem. To do so, follow the steps below.

• Tap the Win + R keys to open the Run dialog box.
• Then type “devmgmt.msc” in the field and hit Enter to open the Device Manager.
• From there, look for the keyboard driver and click on it.
• Next, right-click on the keyboard driver and select the Update driver option.
• After that, click the “Search automatically for updated driver software” option to proceed.

Option 5 – Reinstall the keyboard driver

If updating the keyboard driver didn’t help, then you might want to reinstall it. How? Follow the steps below.

• 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. Look for the keyboard driver, right-click on it and then select “Uninstall device”.
• After that, unplug the device and restart your PC.
• Then plug your device back in. Assuming your device is connected to your PC, open the Device Manager again.
• Next, click on the Action button and click the Scan for hardware changes button. That should fix the problem

Note: You could also completely uninstall the driver and go directly to the manufacturer’s website and download the latest driver for your hardware and then install it.

A few days ago we celebrated fixing of months-long PrintNightmare vulnerability by Microsoft, sadly a new bug and issue have been found. Firstly discovered Microsoft stated:

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

A few days ago, Microsoft officially released a patch that was supposed to finally fix it. As you might recall this vulnerability was present for quite some time, Microsoft's solution after a long struggle was to elevate certain privileges to administrator account only and remove user accounts from managing printers. It complicated things a little bit but it was stated payoff was worth it. The new issue now is that on a system that already had accounts created and set, old accounts still can hijack the system, patch issues address only accounts that are created after the fix is administrated, old ones can still do whatever they want. Once again of course Microsoft has stated that until it is again resolved you should again disable the Print Spooler service as a temporary workaround.

Recently, a number of Windows 10 users reported an issue wherein they try to print from their PCs but were unable to and got an error message instead that states, “Port in use, please wait”. However, no matter how long they waited, nothing changed and they were still unable to print from their computers. On the other hand, when some of the users attempted to print wirelessly from their mobile devices, the printing continues which indicates that there is some issue between the computer and the printer. So if you are one of the users who are currently facing this problem, then this post should help. To fix this issue with your Printer, here are some possible fixes you can try that might work.

Option 1 – Run the Printer Troubleshooter

The first thing you can do to fix the “Port in use, please wait” error is to run the Printer Troubleshooter. This built-in troubleshooter in Windows 10 can help you fix most print issues. It checks if you have the latest printer drivers and then tries to fix and update them automatically. Aside from that, it also checks if you have connectivity issues or if the Print Spooler and the required Services are running fine. To run it, follow the steps below.

• Tap the Win + R keys to open the Run dialog box.
• Next, type “msdt.exe /id PrinterDiagnostic” in the field and click OK or hit Enter to open the Printer Troubleshooter.
• Then click the Next button and follow the next on-screen instructions to fix the issue with the printer.

Option 2 – Try updating the Printer drivers

You might also want to try updating your printer drivers. All you have to do is locate the USB Composite Device. For complete details, follow the steps below.

• First, click the Start button and type “device manager”.
• Then click on the “Device Manager” from the search results to open it.
• From there, look for the USB Composite Device option and right-click on it, and select the Update Driver from the options.
• Restart your PC and then click the “Search automatically for updated driver software” option.

Note: You also have the option to download the latest version of your Printer from the manufacturer’s website.

Option 3 – Try selecting the correct port for your Printer

If the first two options given above didn’t work, then maybe it’s time to select a correct port for your printer since the wrong port has been selected which is why you’re getting the “Port in use, please wait” error.

• Open “Devices and Printers” from the Start search.
• Next, look for your printer from the list of devices and right-click on it, and then select Printer Properties.
• Now go to the Ports tab under the newly opened Properties window and make sure that the port type matches the connection on the list of ports currently in use.

Note: If your printer is using a USB connection then the port should have a USB or DOT 4 in its description but if your printer is using a network connection then it should have the following description:

• WSD
• Network
• IP

And if you notice that there are several listings for the same type of port, you have to change the selection to a different one and then click the OK button to save the changes made.

As you know, the Microsoft store is a built-in tool in Windows 10 where you can find a variety of applications. It helps users in downloading or updating apps in the system. However, there are instances when you could encounter issues while using it. One of the issues that you could face when using the Microsoft Store app is when it keeps on offering apps you have just updated or when you are not able to update any apps at all. This kind of issue in the Microsoft Store app might be caused by other issues like a damaged Windows Store cache. There are several options you can check out to resolve the problem. You can try to check the registry setting or run the Windows Store apps troubleshooter or clear the Windows Store cache manually or reset its settings. You could also try to re-register the Microsoft Store app. For more details, refer to each one of the options provided below but before you troubleshoot the problem, make sure that you create a System Restore point.

Option 1 – Run the Windows Store App troubleshooter

The Windows 10 Store Apps Troubleshooter will help you in fixing the problem in Microsoft Store. This is a great built-in tool from Microsoft that helps users fix any app issues. To use the Windows Store Apps Troubleshooter, follow the steps below.

• Tap Win + I keys again to open the Windows Settings panel.
• Go to Update & Security and then go to Troubleshoot.
• Under the Troubleshoot section, on your left-hand side, scroll down to find Window Store Apps.
• Then click on the Run the troubleshooter option and follow the on-screen instructions and then see if it fixes the problem.

Option 2 – Try checking the settings in the Windows Registry

The next thing you can do to fix the problem is to check the Registry settings for the Windows Store.

• Tap the Win + R keys to open the Run utility and type “Regedit” in the field and then hit Enter to open the Registry Editor.
• Next, navigate to this registry path: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionCurrentVersion
• From there, look for the DWORD named “CurrentVersion” and make sure that its value data is set to 6.3, but if it’s not then change its value data to 6.3
• Exit the Registry Editor and restart your computer and then see if it fixed the problem with the Microsoft Store app.

Option 3 – Try to reset the Microsoft Store cache

Just like browsers, Microsoft Store also caches as you view apps and games so it is most likely that the cache is no longer valid and must be removed. To do so, follow the steps below.

• Right-click on the start button and click on Command Prompt (administrator).
• Next, type in the command, “exe” and tap Enter. Once you do, the command will clear the cache for the Windows Store app.
• Now restart your PC and afterward, try opening Microsoft Store again and then try to install your app or update your computer again.

Option 4 – Try to re-register the Microsoft Store app via Windows PowerShell

• Tap the Win + X key combination or right-click on the Start button and click on the Windows PowerShell (Admin) option.
• If a User Account Control or UAC prompt appears, just click on Yes to proceed and open the Windows PowerShell window.
• Next, type in or copy-paste the following command to re-register the Microsoft Store app and tap Enter:

powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRootWinStoreAppxManifest.xml

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

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.