It first started happening with the latest Flash. Randomly when watching YouTube videos (or any other video site that uses Flash) I'd have your typical crashes and freezes. However, it extended to more than just FireFox, it would cause constant freezes on my whole computer and anything I would do. It would continue even after I closed FireFox, forcing me to restart. It kept happening over and over and over again, so I downgraded to Flash 10.3. The problem disappeared for awhile, but then came back. Still on Flash 10.3, and seems to happen very often now. I thought it might be hardware problems, or a virus, or drivers were outdated. I checked everything, it's all fine and updated and scanned.

The problem only happens if I try to load any type of Flash video, be it from YouTube or elsewhere, and once it happens it'll keep happening until I restart. I found that by using Windows' "Boot with last known good configuration" it would stop the problem for a good few days, but then return, forcing me to restart and do it again. I re-updated my drivers and opted for nVidia's driver update instead of Sony's official driver for my nVidia card, but no change. I don't know what to do any more, and it's driving me nuts.