vista x64 and sp2.1

hi all, i have tried on two clients to install the sp2.1 oversp2.0. both units threw errors and crashed or failed to installmessages. then sw failed to open crashing on start. had to usesystem restore to get back working.
has anybody else seen this?
both vista x64, fx 1700 and fx 3700
cheers martSolidworksAdministration