Hi aarons3
Have you tried a boot time scan with avast!? Right click the scanner screen, select ‘schedule a boot time scan’ and reboot when requested.
Have you tried some rootkit scanners:
http://www.f-secure.com/blacklight/
http://www.grisoft.com/doc/download-free-anti-rootkit/us/crp/0
Have you tried the usual free anti-Trojan scanners?-
AVG Anti-spyware (requires Win2k/XP):
http://www.ewido.net/en/product/
a-Squared Free:
http://www.emsisoft.com/en/software/free/
Ad-Aware:
http://www.download.com/3000-2144-10045910.html
Spybot Search & Destroy:
http://www.safer-networking.org/en/download/index.html
If you have or none of this helps, please post a HijackThis! log:
http://www.bleepingcomputer.com/tutorials/tutorial42.html