I have zonealarm with everything in "high", norton anti-virus, updated and scan week and use spy bot everyday but for some reason they ALL let a trojan in and never spotted it, here it is:
RegKey : SYSTEM\CurrentControlSet\Services\PSEXESVC
"PSEXESVC.exe" is the process so check task manager.
I managed to spot it by using an ad-aware scan. even trojan remover never spotted it, and I thought I was safe .................