My HP Pavilion a6232n PC had the blue screen error a lot so I factory reset it. After that, it wouldn't start anymore and hangs at a black screen with a blinking underscore after the HP logo. I tried to boot the windows vista recovery disk from the boot menu but it doesn't work. It still goes to the black screen whether I boot the cd or hard drive first. EDIT: It sometimes displays "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER". I don't have a system disk and I have read that the recovery disk can be used for it. When i put it in and press enter, it just has the black screen without the message anymore.