Okay, follwed the advice found on this forum. Downloaded and ran "Spybot Search and Destroy" and "Ad Aware SE Personal". Re ran HijackTHIS, heres the latest hijackThis log:- Logfile of Trend Micro HijackThis v2.0.0 (BETA) Scan saved at 20:42:11, on 03/04/2008 Platform: Windows XP SP2 (WinNT 5.01.2600) Boot mode: Normal 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:\Program Files\Windows Defender\MsMpEng.exe C:\WINDOWS\System32\svch