Fingers crossed this looks like it has sorted it, the micro billing system window has not appeared now since this has been run. Here is the new log Logfile of HijackThis v1.99.1 Scan saved at 17:40:21, on 03/02/2007 Platform: Windows XP SP2 (WinNT 5.01.2600) MSIE: Internet Explorer v7.00 (7.00.5730.0011) Running processes: C:\WINDOWS\System32\smss.exe C:\WINDOWS\system32\winlogon.exe C:\WINDOWS\system32\services.exe C:\WINDOWS\system32\lsass.exe C:\WINDOWS\system32\Ati2evxx.exe C:\WINDOWS\system32\svchost.exe C:\WINDOWS\System32\svchost.exe C:\WINDOWS\system32\spoolsv.exe C:\WINDOWS\Explorer.E