My Limewire kept opening over and over, so I found this place and tried to fix it, but it isn't working.

I uninstalled Limewire but my ctrl+alt+delete isn't working, which makes me think that I have a virius. I'm really not very good at these type of things. It hasn't been long since this happened. It has only been a day, so I really want to fix this before everything gets screwed up.
(I'm on windows xp if that means anything to solving this problem)

I cannot find anything with "winupdates". I got that taskmgr onto my desktop and when I open it the system idle process is the only thing running at high cpu.
I can't find "c:\windows\regedit.exe", but I did find "c:\windows\system32\cmd.exe" so that is on my desktop for when I need it.

Someone please help me!!
-Diana