How to settle error code 0x80240031: Windows update encountered an unknown error in Windows 8

Here are a few methods to address the error code 0x80240031:

1. Reboot your PC: Often, a simple reboot can fix the problem.
2. Use the Windows Update troubleshooter: Windows includes a troubleshooter that can detect and solve issues with Windows Update. Navigate to Settings > Update & Security > Troubleshoot > Windows Update to run it.
3. Verify your internet connection: Ensure your PC is connected to the internet and the connection is stable. If you're on Wi-Fi, try using an Ethernet cable to connect directly to your router.
4. Turn off your antivirus software: At times, antivirus programs can block Windows Update. Temporarily disable your antivirus to check if it resolves the issue.
5. Clear the Windows Update cache: Corrupted cache files can cause Windows Update problems. Open Command Prompt as an administrator and execute these commands:

 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. Reset Windows Update components: If previous methods don't work, reset the Windows Update components. Open Command Prompt as an administrator and enter these commands:

 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
 wuauclt.exe /updatenow

After following these steps, try running Windows Update again to check if the issue is fixed.