Vista32 won't do a Windows update and won't boot!

[green granite]

Try doing a roll back to a restore point before you first noticed the problem, you shouldn't loose any data but you would need to re-install any programs installed after the restore point.

Not the most fun solution

This may have some relevance try section 4

Error code 0x80072F8F when you try to search for available updates on Windows Update and Microsoft Update sites