10-07-2006, 06:33 PM
At this point I'm quite confident that you have a hardware problem somewhere. Run memtest overnight - it has to be run repeatedly for a long time to catch flaky ram. I've also experienced the update problems you're having because of a bad hard drive. Or you could have a bad install disc. Or a logic board problem - which you'd only be able to uncover by verifying these parts on another machine.