XP has a SYSTEM RESTORE that worked for me for a smiliar issue.
Does Vista have a System Restore feature too? If it does it would be under
the HELP and SUPPORT section in the START menu or similar!
> Code error 80070643 - no windows updates will install. I can't install
> anything else either. Had Visual Studio 2010 beta installed and can't
> uninstall/reinstall the new released version. Can't install latest iTunes
> 9.1.1 either. Says windows update service not availalbe. I've turned on the
> service but still nothing works. Done everything every other post/article
> says to do - still nothing. I'm not looiking forward to reinstalling Vista
> to solve this....thanks for your suggestions!