Every year, I use my System Recovery CD's to clean my computer off. A few days ago, I put in my first disk and shut down my computer. My computer would not read the disk. I restarted it again and selected F2 when the Sony screen showed up. I was then in the BIOS mode. Then I restored the defaults and it restarted the computer and read my disk. After about 10 minutes, it said that it could not finish the restoration and it shut down. Now whenever I start it up, the black Sony logo screen appears then a blank screen with a blinking cursor appears and stays. I can still get to the BIOS screen, but I cannot do anything else. Any assistance would be greatly appreciated. Thank you for your time.