all my games on the pc lately have been crashing... either they will close the second i try to save inside the game or they will give the illegal operation message and say it must close every time i try to open the game.
anybody know the problem?

Perhaps there is a virus which has hijacked the programs inside of your computer.

This is a real blind-shot, but it has happened to me before.
In that case, my only option was to wipe the hard-disc.

Formatting the hard drive is a last resort and should not be needed in this instance!

Are you 100% sure all your games are crashing? Are there any exceptions?

Has your harddrive been making noises?Different then before?And have you had any viruses recently?