Spyware and Slow Computer

Sounds to me like you may have installed WinXP over an old operating system (like an upgrade) and that is why you do not have an NTFS partition. Also another possible reason for your system being slow.

Right now the Virtumundo problems seem to be gone. I'm surprised considering you did not find most of what we where looking for and were unable to run the commands.

I forget whether I asked this or not yet:
-What is your processor speed and type?
-How much RAM do you have?

When is the last time you did a defrag?

If your system is clean thru another reboot, you should look into getting your Windows updates.