Death can not be backward system?

The two already in my time playing computer games all of a sudden death, the card can not move forward, but there is still NumLock response, did not completely dead.Wan Moshou hegemony is the first time, the second dream is to play, These two games are on the disk D, D do not know if there are disk or the other.I would be dead after the forced shutdown (which is, according to the start button), and then when the boot into the system can not , Have been black.Later, with a key to restore the system after they already had it.What is the reason?

Should not be a bad disc
HDDlife Pro2.8.98 the Chinese version of the Green
to detect under
hard look at your graphics driver is not a problem
or updated graphics driver
other is a virus, then
to ensure that you do not have all of the Division of HIV cases
restore
otherwise go to waste reduction equal to