I recently got a SSD (Samsung 840) and put Win8.1 on it. I was previously running Win7 and everything was fine. As it currently stands, Windows will hang and eventually reboot at least once per day, likely more often. So far it has always happened while browsing the net. It does *not* happen while playing games, even 3D-intensive ones. Exactly once I got the "the driver has recovered" balloon and it managed to continue for about half an hour with Firefox's tab buttons looking all weird before another crash took it down. Every other time it just reboots. I'm perfectly OK with downgrading drivers if this will stop the crashing. I'm currently running 331.82.