Pc Sending Spam Emails, No Trojan or Virus Found - Please Help!

Last night my PC started to send out spam emails (accompanied by Symantec
pop ups and various failiar notices). It starts of slowly and gathers pace
until I have to reboot. I have run a full Norton scan, and three Spyware
programmes with nothing found. I am using Win XP SP2 (up to date).

I have also run various scans in Safe Mode with no joy.

I hope somebody can help as I don't know what to do now. I tried System
Restore but it couldn't do it. What is sending out these emails? It's not
coming from Outlook Express.


How do I find and remove the program/virus etc that is sending the spam out?


.

Loading