I have been getting small shocks from the case of my desktop computer,(especially the screws that hold the cover on). Where can I look to correct this problem? I have tried changing cords and plugs, and this does not seem to help, so I would guess that it has something to do with the computer itself?

Hmm, that's a tough one. I would first make sure you use a surge protector, and see if that takes care of it, you never know.

If not, I'd probably check the motherboard. Usually there are little plastic clips, they've got kindof an arrow on one side, so they can go through the holes in the motherboard, and basically just a little plastic separator on the other side, to keep the motherboard from touching the case. Check to make sure that if you have those, they're all in still, and that the motherboard isn't touching the case.

I have been getting small shocks from the case of my desktop computer,(especially the screws that hold the cover on). Where can I look to correct this problem? I have tried changing cords and plugs, and this does not seem to help, so I would guess that it has something to do with the computer itself??
Have the receptacle tested. You may have a loose wire (ground)
Or you can get your own tester at RadioShack for around $10 or so, and test all your outlets.