I am running 4.90.3000 (from a clean install) and I've had more BSOD's in the past week and a half than in two plus years running Win 98. I've had programs that have worked without problems for months just start acting wierd and crashing all the time. Sometimes, without changing anything, I'd boot to a BSOD; after reboot everything would be fine. There doesn't seem to be any patterns to the crashes. Until now, I had been running Win 98 which had been very stable.