New hear to the site and I need help trying to figure out wth happened to my laptop. I'm not a computer whiz but understand some of the workings. It was originally windows vista that I upgraded to windows 7. Was using it one day and it crashed and wouldn't restart, blue screen of death. I was able to backup my files and figured I would format the hard drive and restore to original o/s. I tried to do every option available when you hit F10 but none worked, tried system repair but that didn't work. Did a quick format and have tried to do a system recovery with the disks but it won't get past the 2nd disk without crashing to the blue screen. I come up with different messages; the last few have been: pfn_list_corrupt, IRQL_NOT_LESS_OR_EQUAL, page fault in non-paged area and Memory management. I did the bios hard disk test and memory test and they both passed. Any ideas or suggestions on what to try would be greatly appreciated.