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Error Code 0x8007007b – What is it?

This error code occurs when users fail to activate their Windows operating system. It is one of the more popular Windows error codes since it affects many versions of Windows including Windows 7, Windows 8.1, and Windows 10. Error code 0x8007007b has common symptoms which include the following:

• Inability to activate a Windows installation
• Message box highlighting error code 0x8007007b

Solution

Error Causes

Error code 0x8007007b in Windows 8.1 usually results due to one or more main clauses. Windows 8.1 users may experience this error due to the use of volume-licensed media. The error code may also arise if the activation wizard is unable to connect to Key Management Service (KMS) host computer or if corrupted system files are present on your computer.

Further Information and Manual Repair

Windows error codes such as Error code 0x8007007b can be a complicated issue, requiring the use of technical knowledge and skills. For this reason, we have listed instructions in the simplest of forms to enable even average users to successfully complete manual repair methods that will resolve error code 0x8007007b.

The same approach has been applied to all our error code solutions. See also Error Code 0x00000024 and Error Code 0x80004005.

Below are the two main methods for correcting this issue.

Method One: Use Multiple Activation Key (MAK) to Activate Windows

This method involves the use of a Multiple Activation Key (MAK) instead of the Key Management Service (KMS) to activate the Windows operating system you intend to use on your PC. This manual repair method requires the use of Command Prompt so ensure you follow the instructions provided carefully so as to avoid the risks of causing harm to your system.

• Step one: Select Windows log key + X.
• Step two: Click Command Prompt, then Admin
• Step three: Type in admin password if Command Prompt requests it
• Step four: Type slmgr -ipk followed by the MAK product key. Note that the product key should have 25 characters with dashes between them like this xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

Attempt to activate your Windows installation once you’ve completed the exact instructions above. If you are unable to complete this process, consider getting help from a Windows repair technician or simply move to the next manual repair method listed below.

Method Two: Run System File Checker

System File Checker (SFC) enables Windows users to scan and repair errors or corruption on system files. Since such errors within your system files can cause error code 0x8007007b to occur, follow the steps below to fix this error code.

• Step One: Go to Start and type Command Prompt or CMD.
• Step Two: Run as Administrator
• Step Three: Type sfc /scannow with a space between “sfc” and “/scannow”.

The System File Checker tool will begin scanning your machine for corrupted or missing files in need of repair. If these files are found on your system, the tool will repair and replace them. Once this is done, restart your computer then check to see if you can now activate your Windows operating system.

Method Three: Use 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.

There is various Blue Screen of Death errors that you can encounter as you use your Windows 10 computer and some of these Stop errors have something to do with the win32kbase.sys file. This post will guide you in fixing the BSOD errors related to the win32kbase.sys file.

• A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: Win32kbase.sys.
• Your PC ran into a problem and needs to restart. If you would like to know more, you can search online later for this error: win32kbase.sys.
• SYSTEM_SERVICE_EXCEPTION (win32kbase.sys)
• STOP 0x0000000A: IRQL_NOT_LESS_EQUAL – win32kbase.sys
• STOP 0x0000001E:

KMODE_EXCEPTION_NOT_HANDLED – win32kbase.sys

• STOP 0×00000050:

PAGE_FAULT_IN_NONPAGED_AREA – win32kbase.sys

The win32kbase.sys file is a Windows operating system Base Win32 Kernel Driver file located in the System32 folder so if it ends up getting corrupted or if it went missing, your computer will throw up Blue Screen error. To fix BSOD errors that have something to do with the win32kbase.sys file, here are some possible fixes that could help. Worry not for these possible fixes are not complicated.

Option 1 – Run the Check Disk or CHDSK utility

One of the first things you can try to resolve the win32kbase.sys Blue Screen error is running the CHKDSK utility. 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 C:

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

Option 2 – Run SFC or System File Checker scan

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 to 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.

 Restart your PC.

Option 3 – Try to run the DISM commands

You might want to repair potentially corrupted files in your system as having them could also trigger the win32kbase.sys Blue Screen error. To repair these corrupted system files, you can run the DISM commands:

• Tap the Win + X keys and click on the “Command Prompt (Admin)” option.
• After that, input each one of the commands listed below sequentially to execute them:
  • Dism /Online /Cleanup-Image /CheckHealth
  • Dism /Online /Cleanup-Image /ScanHealth
  • Dism /Online /Cleanup-Image /RestoreHealth

• Once you’ve executed the commands given above, restart your computer and check if the dxgkrnl.sys Blue Screen error is now fixed.

Option 4 – Try to run the Blue Screen Troubleshooter

As you know, the Blue Screen troubleshooter is a built-in tool in Windows 10 that helps users in fixing Blue Screen errors related to the win32kbase.sys file. It can be found in 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.

Runtime Error 217 can be a big problem if you use your computer for business purposes and you have confidential data/documents stored on your system. This runtime error is quite dangerous. It can slow down your PC performance, lead to system failure and crash, make your system vulnerable to hacker’s attack, and also corrupt important files on your system.

Solution

Error Causes

There is no one particular cause behind the Runtime Error 217. This error can be attributed to several factors such as:

• Corrupt, missing, or faulty register DLLs of programs. This is usually the cause for Runtime Error 217 when installation is unsuccessful and the crucial system files fail to be registered within the registry.
• Exposure to Viruses like malware, adware, and spyware. Once a virus (es) gain access to your PC, you may experience Runtime Error 217. These malicious programs can damage your hard drive, boot sectors, memory banks, and registries.
• Outdated Msvcrt.dll (a Microsoft Visual C++ file) file called.
• Incorrect Regional settings

Further Information and Manual Repair

If you see Runtime Error 217 message pop up on your computer screen, you must fix and repair it right away before it becomes a big threat to you and your PC. Though Runtime Error 217 is alarming this does not mean that you need to panic. Keep calm and follow the recommended solutions to fix Runtime Error 217 given below.

• If the error occurs because you called the outdated Msvcrt.dll file, then you must update the file. This can be easily done by clicking the start menu, accessing the control panel, and then hitting the Windows update tab.
• When you experience Runtime Error 217 due to incorrect regional settings on your PC, then to resolve this issue simply go to the start menu and select Control Panel. Now in the control panel, you’ll find the option clock, click on it and go to the language and region settings. Choose your specific regional settings and save.
• If the cause of the Runtime Error 217 is incorrect registry entries and DLL files corruption, then to fix the error, you need to download a Runtime Error 217 fixer. After you download this repair tool, run it on your PC. It scans and detects corrupted files and repairs the error swiftly.
• Nonetheless, if the cause of this problem is a virus, then you need to install a powerful antivirus program. When you run it, the antivirus scans your PC for viruses. Once the scanning is complete the results are displayed on the screen. The results show exactly how many viruses you have on your PC. Once the scan is complete, delete all the files and click repair.

Regardless of whether you have experienced the Runtime Error 217 on your PC or not, it is advisable to install a powerful antivirus and run it every time you use your PC. By running it regularly, you can make sure that you are not exposed to viruses, malware, and spyware programs. Even if your PC gets infected by them, you can delete and remove them timely before the damage is done.

Even with the new Groove Music in Windows 10, a lot of users still prefer to use the old Windows Media Player. This isn’t surprising since Windows Media Player still remains to be one of the best players you can find. However, that does not mean that it is without flaws as it could still encounter some issues from time to time. One of the issues you might encounter when using the Windows Media Player is when you try to burn DVDs or CDs but end up failing due to an error that pops up that says, Windows Media Player cannot detect the length of the file. At the time of writing, it isn’t clear yet what the real cause of the error is. However, there are several fixes that are provided in this post for you to check out so you can resolve the problem. You can try to get rid of any unsupported files from the burning list or you could also try running the Windows Media Player troubleshooters. Aside from that, you could also try to drag and drop music or change the burning speed. For more details, refer to the following options.

Option 1 – Get rid of the unsupported files from the burning list

You must get rid of the unsupported files from the list of files to burn. This list can be found on the right-hand side of the Windows Media Player. One of the indications that a file is causing problems is when there is a white cross in a red circle next to the file. You can simply click on that icon to remove the file from the burning list. Once you’ve gotten rid of all the unsupported files, try to burn your files to the CD or disk once more.

Option 2 – Try running the Windows Media Player troubleshooters

The next thing you can do to fix the error is to run the built-in troubleshooters for the Windows Media Player. Windows 10 actually comes pre-packed with three troubleshooters designed for Windows Media Player. They can help in fixing the “Windows Media Player cannot detect the length of the file” error. To run these troubleshooters, simply tap the Win + R keys to open the Run dialog box and type “msdt.exe -id WindowsMediaPlayerConfigurationDiagnostic” for the Windows Media Player Settings troubleshooter or type “msdt.exe -id WindowsMediaPlayerLibraryDiagnostic” for the Windows Media Player Library troubleshooter, or type “msdt.exe -id WindowsMediaPlayerDVDDiagnostic” for the Windows Media Player DVD troubleshooter.

Option 3 – Try to drag and drop music

Another thing you can check out is to drag and drop all the tracks into the Windows Media Player before you burn them. All you have to do is open the folder where the tracks are located and highlight all of them and then drag them to the Windows Media Player. It should now be able to detect the length of each one of the tracks without any errors.

Option 4 – Try to change the burning speed

Since the burning speed is set to fastest by default, you can try to change the burning speed to resolve the problem. Just open the Options window and then go to the Burn tab. From there, select either Medium or Slow burning speed and save the changes made. Now try to burn your files to the CD or disk once again.

HDMI which stands for High Definition Multimedia Interface is an audio/video interface that can be used to interconnect various multimedia devices. One of the common use for HDMI is when a CPU is connected to a monitor and a projector. Aside from that, it can also be used in connecting Blu-ray players and laptops to televisions as well as monitors. One of the main advantages of using HDMI is that it can transmit both audio and video at high qualities such as 4K using only a single connection. However, you may also experience some issues in using it every now and then and one of them is when you find that after connecting the devices using the HDMI port, the screen appears to be black and there is no audio output. In such cases, there are a variety of hardware malfunctions that could be causing the problem with the HDMI connectivity. Although there a lot of potential causes, there are also potential fixes you can try to fix the problem. Before you troubleshoot the HDMI Port problem, you might want to perform System Restore first as it might help you in fixing the problem. It could be that you’ve made some changes in some of the settings in your computer that triggered the problem. Thus, you can try run System Restore to undo them, refer to these steps:

• First, press 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 Stop error is fixed or not.

If the problem still persists after System Restore, then follow the given options below to further troubleshoot the problem.

Option 1 – Try to physically check the hardware of your computer

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

Option 2 – Run the Video Playback troubleshooter

You might also want to run the Video Playback troubleshooter. To do so, refer to these steps:

• First, open the Windows settings app.
• Then navigate to Update & Security > Troubleshoot.
• From there, scroll down until you see the Video Playback section and click on it.
• After that, you’ll see the Run the troubleshooter button, click on it to run the Video Playback troubleshooter, and follow the next on-screen instructions.

On other hand, you can also run the Hardware and Device troubleshooter if the Video Playback troubleshooter wasn’t able to fix the problem. You can run it from the same page that you run the Video Playback troubleshooter.

Option 3 – Try to rollback, update, or disable the Graphics card drivers

To fix the problem with the HDMI port, you can either roll back, update or disable them depending on your preference in order to resolve the problem.

• First, boot your computer into Safe Mode.
• After that, 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. From there, look for the Display Adapters and click on them.
• After that, right-click on each entry under the Display Adapters. Note that the rollback option is only available if the update was recent. So if it isn’t there, just click on the Update Driver option.
• From there, Windows will automatically check for problems and update the Graphics card drivers.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

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

Option 4 – Try to reset the Monitor

You could also try resetting the monitor or television using its hardware keys and see if it can resolve the problem. You can just refer to your TV or monitor’s guide for more information on how to reset them.

Option 5 – Try some miscellaneous fixes

Apart from the four given options above, you can also check out some miscellaneous fixes to fix the HDMI connectivity issue and here they are:

• You can try to plug out the HDMI cord/cable from both source and destination and then plug it back in after a couple of minutes.
• You can also check if the HDMI cable you are using is still in working condition.
• You can also try to change the source and the destination of the video and see if either one of them is in a non-workable state.
• Try checking if your settings are how they should be as intended in the “Project my screen” option by tapping the Win + P key combination on your keyboard.

What is Active History? A new feature has been introduced in Windows 10 that allows users to stay connected to their tasks across their devices. This new feature is called “Windows Timeline” and using this feature, users could continue their tasks all over their Windows 10 computers as well as on devices that run Android and iOS as well. This new feature was included in Microsoft Launcher and Microsoft Edge on Android devices as well as in Microsoft Edge for iOS devices. In order for the feature to work, you have to send either Basic or Full data and diagnostics of your computer to Microsoft which would sync it all over your devices with the help of the cloud. And now since all your data is stored on your Windows 10 computer and with Microsoft under your account, it is easier for you to access the back and start where you left off. This kind of option is called Active History. In this post, you will be guided on how you can permanently disable Active History using either the Windows Registry or Group Policy. Before you go on further, it is recommended that you create a System Restore Point first in case anything goes wrong. This is a precautionary measure you must take so that you can easily undo the changes you’ve made. After creating a System Restore Point, proceed to the given instructions below.

Option 1 – Disable Active History via Registry Editor

• Tap the Win + R keys to open the Run dialog box and type in “Regedit” in the field and hit Enter to open the Registry Editor.
• Next, navigate to this registry key: ComputerHKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsSystem
• From there, check if you can find a DWORD named “PublishUserActivities”. If you can’t find this DWORD, just create one with the same name and make sure that the base is selected to Hexadecimal.
• After that, double-click on the DWORD and change its value from 1 to 0 to disable Active History.
• Restart your computer to apply the changes you’ve made successfully.

Option 2 – Disable Active History via Group Policy Editor

Note that this second option won’t work if you are using the Home edition of Windows 10. This is because the Group Policy Editor does not come with Windows 10 Home. So if you are not using Windows 10 Home, follow the given steps below.

• Tap the Win + R keys to open the Run box.
• Then type in “gpedit.msc” in the field and hit Enter to open the Group Policy Editor.
• Next, navigate to this path: Computer ConfigurationAdministrative TemplatesSystemOS Policies
• After that, double click on the configuration listing named “Allow publishing of User Activities” to open the configuration page which has the following description:

“This policy setting determines whether User Activities can be published. If you enable this policy setting, activities of type User Activity are allowed to be published. If you disable this policy setting, activities of type User Activity are not allowed to be published. Policy change takes effect immediately.”

• Now you have to select Disabled or Not Configured if you want to disable Publishing of User Activities or Enabled to Enable Publishing of User Activities depending on your preferences.
• Next, click OK and exit the Group Policy Editor and then restart your computer to successfully apply the changes made.

One of the most useful utilities for advanced users in Windows is the Windows command line or Command Prompt. It is efficient in fixing system files, checking the disk for errors as well as other intensive tasks that are made convenient using this. One of the tasks you can carry out using Command Prompt is repairing the Windows bootup process if it encounters any issues. However, if you tried running the “bootrec/fixboot” command and you receive an error message saying, “Element not found”, read on as this post will guide you in fixing this error. This kind of error in the command line could be due to a damaged BCD or MBE, inactive system partition, or it could also be that there is no drive letter being assigned to the EFI partition. Whichever the case is, here are some possible fixes that should help you resolve the problem.

Option 1 – Try to repair BCD

As mentioned the error could be caused by a damaged BCD and so to fix the problem, you need to repair BCD by following these steps:

• First, make sure that you have a bootable Windows 10 USB drive with you and use it to boot your computer.
• Once you’re on the Welcome Screen, click on Next.
• After that, click on Repair your computer located at the bottom-left portion of the window.
• Then select Troubleshoot > Advanced Options > Command Prompt.
• After you open the Command Prompt window, execute the following command:

bootrec /fixboot

• Afterward, enter the next command below to rename the BCD file:

ren BCD BCD.bak

• Next, type the following command and make sure to replace “b:” with the letter of your bootable drive attached to your computer.

bcdboot c:Windows /l en-us /s b: /f ALL

• Now, wait until the process is completed and restart your computer to successfully apply the changes made.

Option 2 – Try assigning the drive letter to the EFI partition

• Tap the Win + X keys or right-click on the Start button and click on Command Prompt (Admin) to open Command Prompt with admin privileges.
• Then type the following command to start the Diskpart utility:

diskpart

• After that, if you receive a UAC prompt, just click on Yes to proceed.
• Next, type the following command to list all the volumes created on your PC including both types of partitions that are visible to a normal user in the File Explorer as well as the ones created by Windows 10 by default which helps it in storing the boot files and other important system files:

list volume

• Now type the following command to select the desired volume:

select volume number

• Then type the following command to assign a letter to the selected volume:

assign letter=<LETTER>

Note: Make sure to replace “<LETTER>” with the letter you want to allocate to that partition. Afterward, it will assign a letter to the selected volume.

• Reboot your PC to apply the changes made.

Option 3 – Try setting the System Partition to Active

Like the first given option, you also have to make sure that you have a bootable Windows 10 USB drive before you proceed to set the System Partition to Active. Once you have it covered, refer to these steps:

• Boot your computer using the bootable Windows 10 USB drive.
• Next, click Next when you get to the Welcome Screen.
• Then click on Repair your computer located at the bottom left part of the window and select Troubleshoot > Advanced Options > Command Prompt.
• After opening Command Prompt, type the following command and hit Enter to start the Diskpart utility. It is a command line-based utility just like Command Prompt but has a UAC prompt once you provoke it. So if you encounter a UAC prompt, just click on Yes to proceed.

diskpart

• Now type the following command:

list disk

• From there, select your primary disk by typing the following command:

select disk number

• After that, list all the partitions on the selected disk by entering the following command:

list partition

• The command you just entered will list all the partitions created on your PC including both types of partitions that are visible to a normal user in the File Explorer as well as the ones created by Windows 10 by default which helps it in storing the boot files and other important system files.
• Now type the following command to select the partition that is usually around 100 MB in size:

select partition number

• Finally, type the following command to mark the partition active:

active

• Then type the “exit” command to exit the disk part utility.

If you suddenly see a black border in your computer’s display then you might be wondering how come this happened but worry not for this post will give you a couple of suggestions that could help you resolve the problem. The black bar could appear at the bottom or just the sides of the screen. Whichever it may be, there are options you can check out. Refer to the options givens below and make sure to follow them carefully.

Option 1 – Try checking the screen resolution

You might want to try checking the resolution of your screen.

• Open the Windows 10 Settings and go to Display.
• Next, go for the “100% (Recommended)” option under Scale and layout for the size of the text, apps, and other items.
• After that, select the Recommended setting again under Resolution.

Now check to see if the black bars are still there. They should be gone at this point, but if for some strange reason nothing has changed, then attempt the steps below.

Option 2 – Try updating Graphics & Monitor drivers

You might want to try updating your graphics and monitor drivers if you haven’t updated them for some time now. To do that, refer to these steps:

• First, boot your computer into Safe Mode.
• After that, 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. From there, look for the Graphics drivers or the Monitor drivers and then click each one of them.
• After that, right-click on each entry and select the “Uninstall Device” option from the menu.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

Note: You can also try to roll back the graphics and monitor drivers back to their previous versions if updating them didn’t work. You can also try visiting the manufacturer’s website and download the graphics or monitor driver setup for your operating system.

Option 3 – Try to run the DISM tool

You can also run the DISM Tool as it might also help in getting rid of the black border or bar on your Windows 10 computer. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth” which could help you resolve the problem.

• Open the Command Prompt with admin privileges.
• Then type in the following commands and make sure to hit Enter right after you type each one of them:
  • Dism /Online /Cleanup-Image /CheckHealth
  • Dism /Online /Cleanup-Image /ScanHealth
  • exe /Online /Cleanup-image /Restorehealth
• Do not close the window if the process takes a while as it will probably take a few minutes to finish.

Option 4 – Troubleshot the problem in a Clean Boot State

There are some instances that some conflicting programs installed in your computer might be the one that’s causing the Black border issue. 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” check box 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” check box.
• 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.

There is a central location in Windows 10 that allows users to view all the notifications from its Action Center. Aside from viewing notifications, users can also manage them and take necessary actions in just one single place. Notifications in Windows 10 look similar to a message icon but can be at variance in function. However, recently, a number of users reported that even though they receive notifications about new actions but when opening them, they see nothing. In other words, the notification is false, and to fix this, read on as this post will provide you a couple of workarounds. The Windows 10 Notifications and Action Center notification messages might show a mismatch. For instance, Windows 10 may say that you have some notifications but when you open Action Center, you find it empty and there are actually no notifications there. Take the case of the following screenshot, the Windows 10 Notification says that there are 6 new notifications available for viewing but the Action Center says otherwise. Before you troubleshoot the problem, you might want to run System Restore especially if you’ve made some changes in your computer prior to this issue which might have messed with the Windows 10 Notifications and Action Center. To perform System Restore, refer to these steps:

• First, press 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.

If the problem wasn’t fixed and you’re still getting false notifications, you might want to troubleshoot the problem further using the options given below.

Option 1 – via Windows PowerShell

• In the Start search, type “PowerShell” in the field and hit Enter to pull up the Windows PowerShell window.
• Next, copy and paste this command and hit Enter to execute it: Get-AppxPackage | % { Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)AppxManifest.xml” -verbose }
• After that, reboot your computer and check if the false notifications are now gone.

Option 2 – Try renaming the Usrclass.dat file

DAT errors like the ones that are associated with the Usrclass.dat file, most likely occur during computer startup, program startup, or while you try to use a specific function in your program. Even so, it can easily be fixed. How? Refer to the given steps below.

• Tap the Win + R keys to open the Run dialog box.
• Then type %localappdata%MicrosoftWindows and hit Enter to get to the location of the UsrClass.dat file.
• After that, look for a file named UsrClass.dat and once you’ve found it, right-click on it and select the Rename option.
• Now rename the file to UsrClass.old.dat and then restart your computer and see if the problem is now fixed or not.

As you know, Windows 10 has a complicated mechanism for Activation which helps in the verification of a genuine copy of Windows 10. However, there are times when you might encounter some errors during the activation process. One of these errors is the error code 0xc000f074. This kind of error could be due to the Key Management Service or KMS which is unreachable by the client computer or if the key used in the SLSetAuthenticationData function call is incorrect. This kind of error mostly affects surfaces on computers that are upgraded from either Windows 7 or Windows 8.1 to Windows 10. In such cases, you may encounter any of the following error messages:

“Windows is unable to reach your company’s activation service. Please connect to your corporate network. If you are connected and continue to see the error, contact your system administrator. You can also click on the error detail to find the exact error. Error code: 0xC004F074.” “Activating Windows(R), (Key hash)… Error: 0xC004F074 The Software Licensing Service reported that the computer could not be activated. No Key Management Service (KMS) could be contacted. Please see the Application Event Log for additional information.” “Error 0xC004F074, SL_E_AUTHN_MISMATCHED_KEY, The Software Licensing Service reported that the key is mismatched.”

To fix the Windows 10 Activation error 0xC004F078, you have to use the correct key for your type of Windows copy or use Command Prompt to reinstall the key or you could also try running the Activation troubleshooter.

Option 1 – Try running the Windows 10 Activation Troubleshooter

The first thing you can do to resolve the Activation error code 0xc000f074 is to run the Windows 10 Activation Troubleshooter. To do so, follow these steps:

• Go to Settings and then select Activation.
• After that, click on the Windows Activation and then troubleshoot. This will help you address most of the commonly found activation issues in Windows devices.

The Windows 10 Activation Troubleshooter will determine if your license key is a valid Windows 10 digital license for an edition that is not currently installed. If it turns out that it’s not, then the troubleshooter will show you how to install the correct edition.

Option 2 – Try to use the correct key for the type of Windows version you have

If the Windows Activation troubleshooter wasn’t able to resolve the error, then you can try using the correct key for your type of Windows version. All you have to do so is check the type of your Windows copy if it’s OEM, retail, or volume. And make sure that you have the correct, valid product key for your operating system.

Option 3 – Try to use Command Prompt to reinstall the key

• In the Start Search, type “command prompt” and right-click on Command Prompt from the search results, and then select “Run as administrator”.
• After that, execute this command to uninstall the existing key: vbs /upk
• Next, you need to install the KMS product key by executing this command: vbs /ipk <The KMS Product Key>
• Once you’re done, you will see a prompt that’ll tell you whether the operation was either successful or not.
• To active, the KMS product key online, use this command: vbs /ato
• Use this command to activate the key using the telephone: exe 4
• After you’ve activated the KMS product key, restart the Software Protection Service. You can also verify the Activation Status to check if your fix was successful or not.

Option 4 – Contact Microsoft Support for assistance

If you’re at your wits’ end in trying to upgrade your computer, you should consider contacting Microsoft Support for help as they can offer you various options that would make fixing Windows Activation error code 0xc000f074 a lot easier and faster.