Other than that there is no malware showing. A system lag like the one described is usually caused by a running process which is using all of the cpu cycles. I would suggest posting in the XP forum so they can analyze what the running processes are doing. They can assist with non-malware related issues there.
P.S. That was my response pertaining too malware..Huggles, Tam!
Mod Edit: Post cleaned up by closing BB Code tags.
Edited by Scarlett, 02 April 2006 - 12:02 AM.