LONG story, but near the end of this hassle, I installed winXP pro on my HD while it was a slave in another computer, everything went fine, and I was able to boot it in the other computer, and winXP ran great. took it out, made it primary, stuck it inother computer, when it goes to boot, it gets passed memory test, and the split second when the screen goes black, instead of going to winXP pro, it reboots. this process hasn't seemed to quit, just keeps rebooting...