I then followed the links to use Hijackthis and got the following results:
Logfile of HijackThis v1.99.1
Scan saved at 19:47:17, on 21/01/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
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\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\Program Files\ewido anti-malware\ewidoctrl.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\Program Files\BT Voyager 105 ADSL Modem\dslstat.exe
C:\Program Files\BT Voyager 105 ADSL Modem\dslagent.exe
C:\WINDOWS\System32\msgconfigrs.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\calc.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Documents and Settings\Ian & Emma\My Documents\Hijackthis\HijackThis.exe
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = cache.mchs.ac.uk:3128
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1;10.170.104.*; vod*; merc*;<local>
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\system32\msdxm.ocx
O4 - HKLM\..\Run: [Ptipbmf] rundll32.exe ptipbmf.dll,SetWriteCacheMode
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [AVG7_EMC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O4 - HKLM\..\Run: [DSLSTATEXE] C:\Program Files\BT Voyager 105 ADSL Modem\dslstat.exe icon
O4 - HKLM\..\Run: [DSLAGENTEXE] C:\Program Files\BT Voyager 105 ADSL Modem\dslagent.exe
O4 - HKLM\..\Run: [BBDial] C:\Program Files\BT Voyager 105 ADSL Modem\BT Broadband.exe
O4 - HKLM\..\Run: [Microsoft Configs 32] msgconfigrs.exe
O4 - HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime -Delay
O4 - HKLM\..\Run: [DXDllRegExe] C:\WINDOWS\System32\dxdllreg.exe
O4 - HKLM\..\RunServices: [Microsoft Configs 32] msgconfigrs.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Microsoft Configs 32] msgconfigrs.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\MSMSGS.EXE
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupda ... 7862080281
O17 - HKLM\System\CCS\Services\Tcpip\..\{1E8DADC7-1954-431A-80C3-DD43CBE61E3F}: NameServer = 194.74.65.69 62.6.40.178
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: ewido security suite control - ewido networks - C:\Program Files\ewido anti-malware\ewidoctrl.exe
Any help would be gratefully received.