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.