Windows Vista users attempting to upgrade to Service Pack 2 may receive the following message:
One or more drivers might be incompatible.
MSDSM – Please read Microsoft Knowledge Base article: 967752
Apparently MS sent down an Automatic Update that, if applied before installing SP2, will give you this error (Wish I knew which one it was…). Following the KB article is helpless, as the patch only applies to Server 2008. Best thing to do is actually just ignore it and continue… worked fine for me.