Ne w bug / Virus???

I serviced a Windows XP Pro Machine today that had a file called “iak.exe” in the start up menu. I could find no reference to this file on the internet. I deleted all references to the file that I could fine and rebooted only to find that it was back. Did this again in safe mode, same thing. Also when loaded if you move your cursor over the Norton 2002 system tray icon the icon disappears, same with Zone alarm. If you try to restart either program they will not run. This is scary! Anybody have any information on this?