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How to fix error code 0xa0430721 in Windows 10?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Error code 0xa0430721 windows 10 is a registry error that can occur when trying to install or uninstall certain programs. This error is typically caused by an incorrect registry key or value.

Other common searches for this error include:

  • error code 0xa0430721
  • error code 0xa0430721 windows 10

1. Restart your computer and try again

  1. First, try restarting your computer by pressing the power button and then clicking on the Restart button.
  2. If that doesn’t work, try unplugging your computer and then plugging it back in.
  3. If that still doesn’t work, try restarting your computer in Safe Mode. To do this, press the F8 key before startup and then choose Safe Mode.
  4. If that still doesn’t work, try reinstalling the Windows 10 operating system.

2. Check for updates and install any available Windows updates

Open Windows Update. On the left, click Settings. On the right, under "Updates," click Check for updates. If there are any updates available, Windows Update will show a message like "There are updates available for your computer." Click Install updates. Windows Update will install the updates and ask you to restart. When you restart, Windows Update will show a message like "Your computer is up to date."

3. Run the Windows 10 System File Checker tool to repair corrupted system files

  1. Open the Windows 10 System File Checker tool by going to Start > Settings > System and clicking on the System File Checker (SFC) link.
  2. On the System File Checker window, click on the Scan for Issues button.
  3. The System File Checker tool will start scanning your computer for corrupted system files.
  4. If it finds any corrupted system files, it will display a list of the files that are corrupted and need to be repaired.
  5. Click on the Repair button to fix the corrupted system files.
  6. The System File Checker tool will then report the results of the repair to the window.
  7. If the repair was successful, the window will say that the file check was successful. If the repair was not successful, the window will list the reasons why the repair was not successful.

4. Run the Windows 10 DISM tool to repair corrupted system files

  1. Open the Windows 10 computer that is experiencing the error code 0xa0430721.
  2. Click on the Start button and then click on the Control Panel option.
  3. Double-click on the System and Security option.
  4. Click on the Windows Update option.
  5. Click on the Change settings option.
  6. Click on the View all updates option.
  7. Click on the Installed updates option.
  8. Click on the Show all updates for: option.
  9. Click on the Update history option.
  10. Click on the blue Advanced options link.
  11. Click on the Repair option.
  12. In the System file corruption dialog box, click on the Check for updates button.
  13. In the System file corruption dialog box, click on the Install updates button.
  14. In the System file corruption dialog box, click on the Repair system files button.
  15. In the System file corruption dialog box, click on the Restart now button.
  16. If the computer restarts successfully, the update has been successfully installed.
  17. If the computer restarts unsuccessfully, continue to the next step.
  18. In the System file corruption dialog box, click on the Troubleshoot button.
  19. In the Troubleshoot dialog box, click on the Advanced options button.
  20. In the Advanced options dialog box, click on the Startup Settings button.
  21. In the Startup Settings dialog box, click on the Restart now button.
  22. If the computer restarted successfully, the startup settings have been successfully changed.
  23. If the computer restarted unsuccessfully, continue to the next step.
  24. In the Advanced options dialog box, click on the File option.
  25. In the File options dialog box, click on the Open button.
  26. In the Open file dialog box, browse to the location where the corrupted system files have been stored.
  27. Click on the Open button.
  28. In the System file corruption dialog box, click on the Repair system files button.
  29. In the System file corruption dialog box, click on the Restart now button.
  30. If the computer restarts successfully, the system files have been repaired.

If the answers above didn't work then you should also try:

  1. Reset Windows 10 to its default settings.
  2. Perform a clean install of Windows 10.