Which makes it even more puzzling that SP2 isn't cumulative.

I'm trying to upgrade my Vista virtual machine at work, largely to fix an issue with the activation service that believes it has been interefered with (it hasn't). SP1 won't install. It gets most of the way, and then decides some updates haven't been configured correctly. Typical of Microsoft, it won't tell me which ones, nor will just make the broken ones fix themselves (like Debian's package system can do).

Last resort is to just start over from the DVD-ROM. Again, typical Microsoft.

Wade.