Min pc er ekstrem langsom og dør

Min computer starter langsomt og hakker hele tiden.. Efter noget tid "dør" den og skærmen slukkes.. Den vil først køre igen efter genstart... Her er en logfil fra hijackthis:

Logfile of HijackThis v1.99.1
Scan saved at 18:52:34, on 02-11-2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmer\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmer\Alwil Software\Avast4\ashServ.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmer\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmer\NETGEAR\WG111 Configuration Utility\WG111CFG.exe
C:\Programmer\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmer\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Documents and Settings\Kjartan\Skrivebord\Hijackthis\hjt.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Hyperlinks
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programmer\Spybot - Search & Destroy\SDHelper.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Programmer\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Smart Wizard Wireless Settings.lnk = ?
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmer\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmer\Messenger\msmsgs.exe
O16 - DPF: {04E214E5-63AF-4236-83C6-A7ADCBF9BD02} (HouseCall Control) - http://housecall60.trendmicro.com/housecall/xscan60.cab
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmer\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programmer\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmer\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmer\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)