I believe the reason why my computer wont start up is because of the many viruses on my computer. At first there would be pop-ups, then my computer would freeze, now it won't even turn on, it just goes to this black screen that say, "Loading PBR for descriptor 2... done. A disk read error occurred press ctrl+alt+delete to restart." Is there anything I can do? Also, I tried pressing F8 to use my computer in safe mode and the same message pops up. I can only go to the boot menu (F12) and the setup menu (F2).