Fix Error Accessing the Registry in Windows

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.

So, you just made some popcorns, dimmed light, relaxed in from of the TV, pressed play on your application and Blu-ray drive can not read your movie. Your movie night failed sadly, but there is hope and in this article, we are going to explore and offer you solutions on what to do when something like this happens so you do not miss another movie night and some hard-earned relaxation. Please note that in this article we are assuming that you are using a Blu-ray player on your PC, so some of the solutions presented are meant only for this case. So the first thing that you are supposed to do is to check the disc itself. You can turn the disc around and visually check the disc for fingerprints and scratches which can be fatal for disc playing, alternatively, you can try to play the same disc on another device and if it fails there also it is not the disc, it is your drive. So if it is no issue with the disc let's see that seems to be a problem with the drive. The common thing that could stop disc reading are cables, check all connections and cables in the back of your device to be sure that everything is plugged in correctly and nicely. After checking cables if the issue persists lens cleaning is the next step. Over time lens from the Blu-ray, the device becomes dirty and dust accumulates on it, there are special cleaning discs on market made especially for this purpose, to clean the dirty lens of optical devices. If you have one put it in and clean your lens. After lens cleaning with a specialty disc, a good idea would be to use compressed air in a can to reduce the dust inside so no excess dust will accumulate quickly again on the lens itself.

So the device is cleaned and checked and still no disc playing?

Update firmware first. In order to accomplish this visit your device manufacturer's website and follow instructions there on how to upgrade firmware. If this did not helped also update or reinstall device drivers. Go to device manager and update drivers for your device by right-clicking on it and choosing update driver. If none of the things helped, go to command prompt as administrator and type in SFC /scannow, leave the process to finish, and reboot.

If you are using your computer and you notice that Hard drive shows high space utilization even if you only have a few applications installed on your computer, then you’ve come to the right place as this post will guide you on what you can do to sort this problem. Upon noticing the odd state of your hard drive and you check the actual volume that’s occupied by the apps in your drive and you see that they are not really occupying a lot of space. This kind of issue could indicate that your hard drive is not showing the correct value for the free storage space of the drive-in your Windows 10 computer. This kind of problem could be passed off as a system bug, however, it could also be a serious problem. In fact, as you are aware, there are hidden folders and files in your computer that could be occupying space and since most of them are associated with system applications, you might not realize it unless you thoroughly check the folders.

The most common causes of the issue are as follows:

1. The system information folder might be utilizing a lot of space. If you wonder where the information for the system restore points is stored, they are stored in the system information folder which in turn is stored in the drive as a hidden file.
2. An issue with system maintenance could cause the problem.
3. Malware or some other software might have created an undetectable hidden file.
4. Space could be occupied by the trashbin folder.
5. These hidden files could occupy significant space in the folder, thus slowing down the system and impacting its performance. If you face this issue, try our suggestions and see if they help you.
6. Run ChkDsk
7. Clear all Junk files
8. Reduce the space occupied by the system restore points
9. Run the System Maintenance troubleshooter

Option 1 – Run CHKDSK utility to check the drive for errors

When it comes to some issues concerning the hard drive or removable devices, there is a utility in Windows that might help which is called “chkdsk”. To use it, follow the steps below.

• Tap the Win + S keys to open the Search box.
• Then type “command prompt” in the field and from the search results that appear, right-click on Command Prompt and select “Run as administrator”.
• After opening an elevated command prompt, copy and paste the following command and hit Enter:

CHKDSK [volume [[path] filename]] [/F] [/V] [/R] [/X] [/C] [: size]]

Note: In the command given above, “[/F]” will try to fix the system errors while “[/R]” will be the one to fix the bad sectors.

• Now if you are prompted to run CHKDSK after your reboot your PC, just tap Y and reboot your PC.
• If CHKDSK is not able to find any errors, tap the Win + E keys and navigate the access window. From there, right-click on the concerned drive and click on Properties.
• After opening Properties, click on the tab Tools and then click on the “Check” button under the Error-checking section.
• Wait until the process is completed and then restart your computer.

Option 2 – Try to delete the temporary files

The error could be caused by some temporary or junk files in your computer and so you need to clear them up to fix the problem. You can achieve that using the Storage Sense feature.

• Open Setting > System > Storage from the WinX Menu.
• From there, you will see a list of all the local and connected storage devices along with the details on the free space. Make sure that Storage Sense is on.
• Next, find a link that says “Free Up Space” and click it to open.
• After that, a screen which is the built-in program in Windows 10 will appear and will scan your computer for the following junk files so you can free up disk space: 
  • Windows Upgrade Log Files
  • The system created Windows Error Reporting Files
  • Thumbnails
  • Temporary Internet Files
  • Previous Windows Installation Files
  • Delivery Optimisation Files
  • DirectX Shader Cache
• Choose the files you want to get rid of and then click on the remove files option. Note that you’ll have an idea of the total size as you select any of the junk files listed above.
• Now go to the “Free Up Space Now” section and click the Clean Now button. This will get rid of all the temporary or junk files in your computer and should hopefully fix the error.

Option 3 – Try to reduce the space occupied by the system restore points

In case you don’t know, system restore points actually occupy a significant space in your computer which is stored in the System Information folder. Thus, you need to check the size of this folder and unhide the folders and files and then click on the folder. The size of the folder should be displayed in the right pane of the window. To fix the storage space problem, you could delete all the old System Restore Points as well as Previous versions of files or you could also restrict the disk usage of the System Restore points.

Option 4 – Try to run the System Maintenance troubleshooter

The problem could also be caused by the System Maintenance and to fix it, you have to run the System Maintenance troubleshooter by following these steps:

• In the Windows Search bar, type “control panel” and double click on Control Panel from the search results.
• Next, go to this path: Control PanelAll Control Panel ItemsTroubleshootingSystem and Security.
• After that, click on the System Maintenance troubleshooter to run it.
• Once the process is completed, restart your computer.

Being in the Microsoft Windows insider program will let you get a hands-on new Windows 11, but some people just want Windows 11 without being in the insider program. Well, people beware! It was detected that some groups have been releasing fake Windows 11 installers with malware into them. There’s one malicious file called 86307_windows 11 builds 21996.1 x64 + activator.exe. Based on the filename, one might guess that it includes Windows 11 build 21996.1, and on top of that, there’s something in it that will automatically activate Windows for you. It comes in at 1.75GB, so for some people, that might seem reasonable. It starts out looking like a normal installer, and then there’s a second installer that calls itself a download manager. If you accept the nonsense agreement that’s included, you get a bunch of malware. This is just one example of malicious installers running amok internet, but there are more of them with different software placed inside. Malware can be anything from adware to a Trojan virus. The adware usually isn’t super dangerous. It’s just malware that’s meant to inject your PC with advertisements. Viruses can be more of an issue, and they can be harder to get rid of if your machine is infected. Windows Defender does a good job of getting rid of this stuff. The only problem is that if you’re downloading Windows 11 from shady sources, you’re probably already set to click through the dozen or so warnings that pop up telling you not to install it. The solution will be to get Windows from a trusted source of roll inside the insider program and get it from Microsoft directly.

Same as in Windows 10, Windows 11 also features a lock screen. IN this lock screen by default, you will see a clock and date above the standard Windows 11 background. Not all users will be happy with this choice but do not worry, you can choose and customize your lock screen to better suit your idea of it.

To personalize the lock screen do:

1. Right-click on Desktop and select Personalize
2. Click on the lock screen
3. Choose one of three options and customize it

   • Personalize Your Lock Screen

     this option will let you set a custom image or slideshow for your lock screen. Choose either one that best suits you. Under selecting picture or pictures for the slide show you can uncheck the option to see tips, tricks, and facts on your lock screen.

   • Lock screen status

     when clicking on this option you can select the application widget that you wish to be shown on the lock screen like weather, mail, calendar, etc. Choose if you would like one by clicking on it.

   • Show the lock screen background picture on the sign-in screen

     as self-explanatory this switch will enable or disable chosen lock screen wallpaper on your login credentials screen.
4. Close settings

All settings will be automatically saved and applied and when you wish to lock the screen easiest way is to press ⊞ WINDOWS + L shortcut on your keyboard.

If you have a laptop that is slowing down and some usual tasks are sluggish you probably mean that it is time to change it and get a new one. Altho it is a good solution and it will guarantee that you will be able to do your tasks with more speed and comfort, straight purchasing is not always the best thing to do.

There are things you can do and some upgrades that are cheaper and will bring your laptop back into the game and extend its usage for a few more years.

1. Clean it

The most common issue for slowing down of computer is dust and dirt that accumulates over time and usage. If the laptop has not been properly cleaned in a while, cleaning it and placing new thermal paste on the CPU can do wonders. If you are not keen on doing this yourself or do not possess the required skillset take it to your local IT center for cleaning.

2. Uninstall software that you are not using

Various software can have speeding effects on computers, it can have some services running in the background and thus take precious resources slowing the whole system. If you are not using software, uninstall it.

3. Do not install the latest software

If you are using your computer for basic tasks there is no really need to install the latest and best. A lot of new software will require new hardware and things that offer are not so much better nor even required to justify the upgrade. Let us take office, for example, if you are using it to just write some text and not using any advanced options there is really no need to switch to a newer version, the old one will do just fine tasks that you are in need of.

4. Replace HD

Now this fits in the domain of upgrading your hardware but still it is much cheaper than replacing the whole laptop. Windows 10 works much better with SSD and SSD itself is faster than your standard HD, especially if it is slower model spinning in only 5400RPM. Operation of HD replacement is simple and straightforward and anyone can do it but the benefits of replacement will be visible right away. With a new SSD instead of an old mechanical one, you will have the feeling that you actually bought a new laptop.

5. Add more RAM

This is basically the last thing you can do in order to speed up your old laptop that will not break your bank account. Upgrading RAM was always the thing that can push your computer to have more power and to behave better while you are doing tasks. One important thing here is to first see how much RAM you have in your computer. If you are packing already 8GB then upgrading will not do much but if you have only 4GB, raising it to 6GB or 8GB will be beneficial. Also, check if the model of the laptop supports more RAM in the first place.

Conclusion

We have covered here a vast array of options in order to get your laptop back into the game with variability between hardware upgrades to taking care of your software. Whatever option you choose to do it will speed up your computer but among all of them, replacing the hard drive will do the most.

A number of users have recently reported that they were going through an issue with their Bluetooth devices on their Windows 10 computers. This issue involves an error saying,

“Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52).”

If you are one of the users who encountered this kind of error on your Windows 10 computer, read on as this post will guide you on how you can fix this Bluetooth error. According to security experts, the key to fixing this error is to sign the Bluetooth A2DP files with the built-in tool, System File Checker. Apart from that, you could also run the Hardware and Devices troubleshooter or perform System Restore, as well as update or reinstall the concerned drivers. For more details, refer to each one of the options provided below.

Option 1 – Try to check Bluetooth-related services

In Services, there is a Bluetooth-related service that helps users use Bluetooth so if that particular service suddenly malfunctions for some reason, you will most likely get the “Windows was unable to connect with your Bluetooth network device” error message. That’s why you need to check Services and to do that, refer to these steps:

• Tap Win + R keys to open Run prompt and type in “services.msc” then tap Enter to open Services.
• Next, look for the Bluetooth Support Service and double click on it to open Properties.
• From there, verify if the Service status is showing “Running” or “Stopped”. If it’s the latter, you have to click the Start button.
• Lastly, check if the Startup type is set to Manual.

Option 2 – Try running System File Checker or SFC scan

You could also run System File Checker or SFC scan to fix the Bluetooth error. It 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.

• Reboot your PC.

Option 3 – Try to perform System Restore

You might also want to perform System Restore as the error might be caused by system modifications. Thus, to undo them, you can use System Restore. Run it using these steps:

• First, 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.

Option 4 – Try running the Hardware and Devices Troubleshooter

The next thing you can do to fix the problem is to run the Hardware and Devices troubleshooter. Although it won’t make much of a difference, there’s still a possibility that it could automatically fix the Bluetooth error. 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 5 – Try to reinstall or update the Bluetooth driver

The issue might have something to do with the Bluetooth drivers. It could be that it is outdated and needs to be updated or that you recently updated it and since then you have trouble removing the Bluetooth devices and so to fix the issue, you can update, roll back or uninstall the Bluetooth drivers. How? Follow the steps below.

• Tap the Win + X keys to open the Device Manager.
• Next, look for the Bluetooth device and right-click on it.
• Select the option “Update driver”.
• After that, a new popup window will appear. In there, select the option, “Search automatically for updated driver software”.

Note: Checking the update may take a few minutes so you’ll have to wait until it finishes. If it is able to find an update, you must install it. And if you want to reinstall the Bluetooth driver, just select the “Uninstall driver” option and follow the next on-screen instructions that follow.

When Windows 11 update is available but you do not wish to restart right away because you are in the middle of using a computer, you can schedule a restart for up to 7 days. It is very easy and we will show you how to do it.

1. Press ⊞ WINDOWS + I to open settings
2. Click on Windows Update
3. At the top, under the Restart required to click on Schedule the Restart
4. Click the switch under Schedule a Time to turn it ON
5. Use the Pick a Time and Pick a Day menu to set time and day when you want to update
6. Go back to one screen and visually confirm that the date is set
7. Close the settings

The scheduled restart will be confirmed in a message on the Windows Update page.

Error Code 0xc00007b – What is it?

Error code 0xc00007b usually manifests itself via the inability to start an application properly. It can occur when users attempt to run a game or other programs on their computer. In such a case, the application will not start and a message box will pop up stating that error code 0xc00007b has occurred. The error code is likely to occur when users attempt to run a program in the incorrect or inappropriate bit. For instance, if you try to load a 32bit location with a 64bit location.

Solution

Error Causes

Error code 0xc00007b affects various versions of the Windows operating system, including Windows 7, 8, 8.1, and Windows 10. In the case of error code 0xc00007b for Windows 10, the error may be caused by issues related to software you’ve installed on your machine. This may cause software conflict resulting in the need to install programs like DirectX. Left unchecked, error code 0xc00007b could incite other error codes in Windows 10, such as error code 0xc004f034.

Further Information and Manual Repair

To repair error code 0xc00007b for Windows 10 devices, users will need to implement at least one manual repair procedure. Manual repair methods are effective in combating these issues as they can address the issues causing the error in the first place, thus fixing the problem.

The manual repair procedures for fixing error code 0xc00007b are very straightforward and can be implemented with little technical knowledge. However, you may need to contact a Windows repair technician if you have difficulty fixing the error code after completing the manual repair methods listed below.

Method One: Install Microsoft DirectX

Microsoft DirectX is an application usually included in the Microsoft operating system. It enables users to access high-speed gaming and multimedia on their PC. The latest version of this Windows technology is available on Microsoft’s official site.

Visit the Microsoft website and search for DirectX End-User Runtime Web Installer. Once you have located the latest version of the program, select the preferred language you would like DirectX to run in, and then click download. Run the program, then be sure to reboot your computer.

Note that this solution should only be applied if you are having issues running or displaying a gaming or multimedia application. Once you’ve correctly installed the latest version of DirectX, it should be able to fix underlying issues that may be causing error code 0xc00007b to occur. If you are still unable to run applications after completing this manual repair procedure, however, you will need to apply another method to fix error code 0xc00007b for Windows 10.

Method Two: Install Latest Version of .NET Framework

.NET Framework, a framework developed by Microsoft, provides solutions for users who may be having problems with applications. To download the latest version of the .NET framework, follow the steps listed below.

• Step one: Open your favorite web browser
• Step two: Enter www.microsoft.com/net
• Step three: Click Downloads
• Step four: Select the latest version of the .NET Framework by clicking the framework at the top of the list. (Currently, the latest version is .NET Framework 4.6.2.)
• Step five: Select preferred language, then download
• Step six: Run software.

To ensure you successfully download the latest version of the .NET Framework, verify your computer is properly connected to the Internet while downloading the software. Also, follow the instructions provided on the Microsoft website.

After completing the download process, reboot your computer then check if you have successfully resolved error code 0xc00007b for Windows 10. If this manual repair method is successful, you will be able to access your gaming and multimedia programs. Otherwise, the error code message box will reoccur, stating that the application error code is present on your device. Apply the next manual repair procedure to correct the error code if this reoccurs.

Method Three: Install Windows Updates

In certain instances, application error codes like error code 0xc00007b affect PC users who fail to install the most current Windows updates on their device. That is why it’s important to check your system and ensure you have installed all the latest updates.

The updates, if any are available, will automatically be installed on your PC once you access Windows Update in Settings. Reboot your computer then check if you are able to run programs that previously would not open due to error code 0xc00007b. If problems persist resulting in the reoccurrence of the error code, reinstall the applications you are unable to open or get help from a Windows repair technician.

Method Four: 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.

The TWCU.EXE or TP-LINK Wireless Client Utility is a configuration application required to run wireless adapters successfully. The TP-LINK Wireless Client Utility application only exists on computers that are using the TP-LINK adapters. Upon the installation of this application, the service will be automatically added to the Windows service list that will continuously run in the background. The Twcu.exe is placed at the C:\Program Files\TP-LINKTP-LINK\Wireless Utility folder and is used by TP-LINK to connect to the internet. The name of the main executable file is twcu.exe and can be viewed in the Services tab of the Task Manager. If you are one of the users who just upgraded to Windows 10 from the previous Windows versions, then you’ll most likely see an error saying, “Failed to load the library file!” that has something to do with twcu.exe or TWCU. This error pops up when you go to your desktop and every time you log into your Windows 10 PC. Like pointed out, this error is related to the TP-LINK Wireless Client Utility and every user who is using the TP-LINK Wireless Client Utility is experiencing this problem which may be due to some compatibility issues especially when you start getting this error right after you upgraded to Windows 10. To fix this problem, follow each one of the options given below.

Option 1 – Try running in Compatibility Mode

The best thing you can do is to run the TP-LINK Wireless Client Utility in the compatibility mode since the problem is due to some compatibility issue. To run this utility in the compatibility mode, here’s what you have to do:

• Look for the TP-LINK Wireless Client Utility which should be located on your desktop.
• Once you find it, right-click on it and select Properties from the context menu.
• After that, go to the Compatibility tab and mark the checkbox for “Run this program in compatibility mode for:” and from the drop-down list, select either Windows 7 or Windows 8.
• Click the Apply button and then click OK to save the changes made and check if it has resolved the issue or not.

Option 2 – Try troubleshooting compatibility

This option is almost the same as the first one except it is an alternative way of fixing the TP-LINK Wireless Client Utility in case the first one didn’t work. In this option, you will troubleshoot the compatibility issue of the TP-LINK Wireless Client Utility.

• Look for the TP-LINK Wireless Client Utility which as mentioned, is on your desktop.
• Then right-click on it and select the “Troubleshoot compatibility” from the context menu.
• After that, click on the “Try recommended setting” option. Once the process is done, the error message should be gone.