How do I fix the 0xc000021a error in Windows 10?

0xc000021a is a Windows error code that indicates that the Windows kernel has detected an illegal or unknown processor instruction. This can happen if the processor is not compatible with the operating system, if the processor is damaged, or if a driver or program is corrupt. This error can also occur if the system is not configured properly, or if the system is not functioning correctly.

Other common searches for this error include:

• windows 10 error code 0x000021a
• 0xc000021a windows10

• Boot your computer in Safe Mode
• Use the System Restore tool to restore your system to a previous working state
• Run the Windows 10 Startup Repair tool
• Run the Windows 10 Automatic Repair tool

1. Boot your computer in Safe Mode

1.Start your computer in Safe Mode with Networking. 2.Open the Start menu, type "cmd" and press Enter. 3.Type "netcfg" and press Enter. 4.Type "safeboot" and press Enter. 5.Type "reboot" and press Enter.

2. Use the System Restore tool to restore your system to a previous working state

1. Open the Start menu and search for "System Restore."
2. When System Restore appears on the list, click it to open it.
3. On the System Restore window, click the "Create a restore point" button.
4. Name the restore point and click the "Create" button.
5. On the next screen, select the date and time that you want the restore point to be created, and click the "Create" button.
6. Click the "Restore this computer to the last working state" button.
7. On the next screen, select the restore points that you want to restore your computer to, and click the "Next" button.
8. On the next screen, select the restore point that you want to restore your computer to, and click the "Restore" button.
9. When the restore process is finished, click the "Finish" button.

3. Run the Windows 10 Startup Repair tool

1. Open the Start Menu and search for "Windows 10 Startup Repair."
2. Click on the "Windows 10 Startup Repair" icon that appears in the results.
3. If the "Windows 10 Startup Repair" tool is not already open, click on it to open it.
4. In the "Windows 10 Startup Repair" tool, click on the "Startup Repair" button.
5. In the "Startup Repair" tool, click on the "Repair your computer" button.
6. In the "Repair your computer" window, click on the "Next" button.
7. In the "Repair your computer" window, click on the "Advanced options" button.
8. In the "Advanced options" window, click on the "Startup Repair" button.
9. In the "Startup Repair" window, click on the "Fix startup issues" button.
10. In the "Fix startup issues" window, click on the "Next" button.
11. In the "Fix startup issues" window, click on the "Repair your computer" button.
12. In the "Repair your computer" window, click on the "Finish" button.
13. If the "Windows 10 Startup Repair" tool reports that the problem has been fixed, click on the "Yes" button.
14. If the "Windows 10 Startup Repair" tool reports that the problem has not been fixed, click on the "No" button.
15. Close the "Windows 10 Startup Repair" tool.

4. Run the Windows 10 Automatic Repair tool

1. Open the Start Menu and type "repair".
2. Click on the "Repair your computer" option.
3. Select the "Windows 10 Automatic Repair" option.
4. Follow the on-screen instructions.

Still not working? maybe try one of these options:

1. Use the DISM tool to repair your Windows 10 installation.
2. Use the SFC tool to repair your Windows 10 installation.
3. Reinstall Windows 10.