Last night I was listening to music and just talking on aim. All of a sudden a blue screen appears saying DUMPING PHYSICAL MEMORY. It auto restarted itself. Now whenever I try to boot normally it gets to the window logo (the first one with the repeating progress bar) and it stays on that for 20 seconds and just flashes a blue screen with some text and restarts. when I try to boot in safe mode I get a UNMOUNTABLE_BOOT_DEVICE error. I tried windows recovery and HP recovery but both just restart. I was wondering on how to solve this. All my files are still safe (i used a linux live cd to make sure they were) but I would like to use XP again. I am using a prebuilt computer so I do not own a copy of windows. To reformat would mean I would lose the OS or whatever. Is there any suggestions?