One day I left my desktop on so it could do a virus scan and when I returned back about 1 hr later I saw that the screen was black and has this error "A disk read error occurred. Press CTRL-ALT-DEL to restart". I restarted desktop and it posted fine but still shows disk error right after that. Does anybody know what is causing that or is the disk starting to fail. Please help if you can. Thanks! 😀