Lemme start off by sayin' ...i don't even remember when i reinstalled my OS last ..... N' i don't have a single problem with it ... N' yes ... i do update the patchs/fixs almost all the time.
Patchs/fixs are released to rectify exixsting problems not create newer ones
..... But then i would hafta agree with Kangaroo on one thing ... n' that would be that beta packs (pror to final release)
Now coming to ur problem ... This is what i suggest
1. Remove all installed PCI cards .. Boot up ur machine ..see if u have any issues.
2. Now put in the card's one at a time ...n' switch on the machine ..again check for problems.
3.U should be able to pin point the device which is cauing the problem by now ... Get the right drivers for it n' reinstall them ..