How to solve the error code 0x80070490: Windows cannot install required files in Windows 8

There are several ways to solve the error code 0x80070490 in Windows 8:

1. Run the Windows Update Troubleshooter: Go to Control Panel > Troubleshooting > System and Security > Windows Update > Run the troubleshooter.
2. Check for corrupted system files: Open Command Prompt as an administrator and type "sfc /scannow" and press Enter. This will scan and repair any corrupted system files.
3. Reset Windows Update components: Open Command Prompt as an administrator and type the following commands one by one:

   net stop wuauserv
   net stop cryptSvc
   net stop bits
   net stop msiserver
   ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
   ren C:\Windows\System32\catroot2 catroot2.old
   net start wuauserv
   net start cryptSvc
   net start bits
   net start msiserver

4. Perform a clean boot: Press Windows key + R, type "msconfig" and press Enter. Go to the Services tab and check "Hide all Microsoft services". Click "Disable all" and then go to the Startup tab and click "Open Task Manager". Disable all startup items and restart your computer.
5. Perform a system restore: Go to Control Panel > System and Security > System > System Protection > System Restore. Choose a restore point before the error occurred and follow the prompts to restore your system.

If none of these solutions work, you may need to reinstall Windows 8.