of late whenever i start my system or when i log off one user n log in to another windows user profile i get this message form my Avast antivirus. and everything works fine after deleting the tmp file. the tmp file gets created automatically at every system start or user login. scanned the system with Avast scanner. No Virusses. ran spybot and ad-aware ...nothing found and i also run spyware blaster. google search for the trojan took me to avast website where they identify list of recent updates. nothing else. well any idea wat the problem cud be??