I have an HP Pavilion 3000, about 3 years old running XP home edition. A few days ago I had been using it most of the day, and when I left for al little while and came back the screen was black. No matter what key I pressed, I could not get the screen back on again. I could hear what sounded like the fan, a little louder than usual, but not the whirring of the hard drive. I rebooted it several times but nothing would happen. I hooked the monitor to another computer, and it worked fine, so I know it was not the monitor. Finally after rebooting it about 6 times with nothing but a black screen, it finally came up incredibly briefly with the blue screen. I quickly pressed the F10 key, and it started to do a system --------. It asked me if I wanted to continue or do a restore to a certain date, and I chose to restore. It worked fine for about 3 hours, and then all of the sudden just went black again with the louder fan sound. I did the same process again, and it worked fine for about 1 day, and then out of the blue it went down again. I am really not very good with understanding computers, just using them, so if anyone can help, I would really appreciate it.