Think I have a RAT on my comp

[Quintus]

Should I get the free version, or find a cracked full version on HF? I'd purchase a real full version but I have no money as of now.

I will go against finding a cracked version. The free ones work fine.

Any Suggestions?
And Internet Usage, like browser history or?

System:
Microsoft Windows XP
Home Edition
Version 2002
Service Pack 3

Intel®
Celeron®
2.53 GHz
512 MB of RAM

Oh, it seems like we have a problem with your computer specifications. I would say, either Avast! or Avira. Please install one of the latter, only after fully uninstalling McAfee and ESET.