Is it possible you have got a store-and-forward trojan where it stores a bunch of spam on your pc for a little while then sends it off again so it looks like YOU are the spammer? Disconnect from the net and see what it says about free space. If it is steady, I would think you have a problem.
Change the world. Of one person. Today.
If your equation requires either a complex combination of variables to get the desired result OR you can't seem to get the result regardless of the variables....it ain't your variables, it's your constant.