I wrote this little script that has worked for me to remove eTrust PestPatrol Anti-Spyware Corporate Edition 5.x.
:: PestpatrolUninstall Version 1.0 (Build 20051221) @ECHO OFF>NUL :: PestPatrol Remote Service is installed by the execution of :: eTrust PestPatrol Anti-Spyware Corporate Edition console NET STOP “PestPatrol Remote†C:\WINDOWS\system32\ppRemoteService -unregserver ECHO Y| DEL “C:\WINDOWS\system32\ppRemoteService.exe†:: PestPatrol Folder to be removed :: REGSVR32 “C:\Program Files\Common Files\PestPatrol\ppctl.dll†:: REGSVR32 /u “C:\Program Files\Common Files\PestPatrol\ppctl.dll†ECHO Y| RD “C:\Program Files\Common Files\PestPatrol†/S