New Lag

[Steelwind]

I went to a friend's house for a week and I come back to find that my mom found it cute to do something really wierd with our computer, that we have to share, since I'm, er... 15. Anyway, it deleted some programs and some files, but not others. I usually get about 180-200 ping on the client startup page, but now it's anyway from 800-2500. People tell me to scan for spyware, but how can it be spyware, if, she somehow 'cleaned' this computer? I'm no genius, but do I need to download DirectX or something of that nature? The internet runs smoothly, but all the games I play now lag horrendously. Can anyone help me? I was bad enough getting my NORMAL ping of 200. I have 56k and Windows XP on this computer.
It'd be cool if I got no responses like "get a better connection." Thanks.

[Superted]

Have you actually scanned for spyware?