I've been using these programs for several years now with no problems. I've always used Athlon based computers, and my first one (I think it was a 1200) was slow, but problem free. Each year I get a faster computer, and run problem free. I just got a 5200 Dual core. Rip it for me (DVD Decryptor) will rip the disc to my HD with no problem. When I run shrink, it gets anywhere from 20% to 40% and the computer shuts down. The same thing happens with Convertx. I've tried Win XP, Vista and Win 7, all with the same results. I have a MASSIVE CPU cooler, so don't think it's an overheating problem, especially when I can rip the disc 4 or 5 times, one right after the other. Any ideas would be appreciated.
Ripping the disk isn't the same as transcoding the video. One is quite sedate the other is CPU intensive. You can check the temperature of the cpu using a utility like Hmonitor to rule that out as a cause.