I've been happily mining away on my 5830 for over a month and then a few days ago it became unstable. After a couple or three hours the computer crashes and reboots. I haven't been around the computer when this happens, but when I get back the computer is no longer mining and is asking for the password to get back into my desktop. At first I thought it had something to do with the latest round of MS updates (Win7) so I did a rollback of my system, but that didn't help. I upgraded poclbm to the latest version and that didn't help. I use GUIminer.

I got a program called BlueScreeView to determine what was causing the crashes and it says it's the "ATI Radeon Kernel Mode Driver"

I'm running out of things to try, suggestions appreciated.