How to resolve error code 0x80070003: Windows can't install required files on Windows 8.1

There are a few ways to resolve the error code 0x80070003 on Windows 8.1:

1. Use the Windows Update Troubleshooter: Head to Control Panel > Troubleshooting > System and Security > Windows Update > Run the troubleshooter.
2. Remove the Software Distribution Folder: Navigate to C:\Windows\SoftwareDistribution and delete all files and folders inside it. Restart your computer and attempt the updates again.
3. Disable your antivirus temporarily: Sometimes, antivirus software can hinder the installation process. Disable your antivirus briefly and try the updates again.
4. Check your hard drive for errors: Open This PC > Right-click the drive you want to check > Properties > Tools > Check. This will scan and fix any detected errors.
5. Reset Windows Update Components: Open Command Prompt as an administrator and enter 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 

6. Perform a System Restore: If the above methods don't work, try restoring your system to a previous state when everything was functioning correctly.

Note: Ensure you have a backup of your essential files and data before trying these methods.