freezing monitor, video card?

how did it freeze, describe a little more detail might
help
>-----Original Message-----
>What can I do to stop my computer from freezing all of
>the time. Some have said that it's my video card
getting
>overloaded. This is strange though b/c it freezes even
>if there are no programs running. I just recently got
>onto a t1 line and so have gotten a few viruses, but all
>of my scans show that my computer is clean. Can
somebody
>please help me?! Thank you very much for any helpful
>reply.
>.
>