After a long time away, I tried using SL again. The SL viewer as well as Firestorm and Exodus launches, logs in and plays just fine. But when I exit the viewers, every one of them causes total corruption of the computer's display - the system is still intact and usable but the display looks like some kind of weird distorted photoshop swrily rainbow effect, rendering the system completely unusable until restart. Then it looks like normal. This happens after every new launch of SL or any other vie