my pc has a virus and i deselected all stuff in start up,now it wont boot up at all! theres a green light on but nothing on moniter and it makes beeps too. please help. i also deleted registery keys for programmes i don't have anymore,will this have affected it.

Beeping generally indicates a hardware problem, not a software problem. The beep code can be used to identify the problem. What is the pattern?

Yes, anything you did to windows should not cause your problem. The bios is in control and indicating a motherboard problem, which is usually either RAM or the graphics adapter.

i took out ram and gave everything a good clean and now it boots up again! i do have a virus though its called Total Security and it wont allow me to remove it.