If this is a "1337 super computer" the video card probably has DVI ports for monitors on the back. Your monitor is probably an older model and has VGA.
Does it look like this on your PC?:

You can by a DVI to VGA adapter for monitors that should fix your problem. They look like this:

And seeing as you are a computer noob, you probably got ripped off and the computer isn't as good as you think. :P