DavidR
4
Try a repair of avast. Add Remove programs, select ‘avast! Anti-Virus,’ click the Change/Remove button and scroll down to Repair, click next and follow. You need to be on-line to do this.
A forum search for Win32:Agent will return more information on the Win32:Agent family and how to deal with it.
Since you have winXP you could enable a boot time scan. Right click the avast icon, select Start avast! Antivirus, Menu, ‘Schedule boot-time scan…’ and see if it is easier to deal with before windows starts up.
If you haven’t already got this software (freeware), download, install, update and run it, preferably in safe mode Ewido anti-spyware