How to solve the error code 0x800705B4: Windows Update error in Windows Vista

There are several steps you can take to solve the error code 0x800705B4 in Windows Vista:

1. Restart your computer: Sometimes, simply restarting your computer can fix the issue.
2. Check your internet connection: Make sure your internet connection is stable and working properly. If you are using a wireless connection, try connecting your computer directly to the router with an Ethernet cable.
3. Disable your antivirus software: Your antivirus software may be blocking Windows Update from running properly. Try disabling your antivirus software temporarily and see if that fixes the issue.
4. Run the Windows Update troubleshooter: Windows Vista has a built-in troubleshooter that can help diagnose and fix issues with Windows Update. To run the troubleshooter, go to Control Panel > System and Security > Troubleshoot common computer problems > Fix problems with Windows Update.
5. Reset the Windows Update components: If the troubleshooter doesn't fix the issue, you can try resetting the Windows Update components. To do this, open Command Prompt as an administrator and type the following 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. Perform a system restore: If none of the above steps work, you can try performing a system restore to a point before the issue started occurring.