Problème Internet Explorer

Salut tout le monde !
J'ai un probleme avec internet explorer a priori... Je tourne sous Windows XP familiale, et quand j'eesaie de me connecter a internet ca marche bien pendant environ 1 minute puis ensuite j'ai une page d'erreur sur chaque site que j'essaie de visiter (page not found). Mais le reste des programme comme genre direct connect fonctionne comme il faut.

Voici mon hijacklog:

Logfile of HijackThis v1.99.1
Scan saved at 10:22:44, on 2005-11-21
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Microsoft AntiSpyware\gcasServ.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Java\jre1.5.0_05\bin\jusched.exe
C:\Program Files\Acronis\TrueImage\TrueImageMonitor.exe
C:\Program Files\Thrustmaster\Thrustmapper\TMTMTSR.exe
C:\Program Files\Fichiers communs\Acronis\Schedule2\schedhlp.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\DAEMON Tools\daemon.exe
C:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
C:\Hijackthis\HijackThis.exe
C:\PROGRA~1\PANICW~1\POP-UP~1\PSFree.exe
C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE
C:\PROGRA~1\Druide\Antidote\Antidote\Gestionnaire Antidote.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [gcasServ] "C:\Program Files\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_05\bin\jusched.exe
O4 - HKLM\..\Run: [WhenUSearchWHSE] "C:\Program Files\WhenUSearch\whse.exe"
O4 - HKLM\..\Run: [WhenUSearch] "C:\Program Files\WhenUSearch\Search.exe"
O4 - HKLM\..\Run: [TrueImageMonitor.exe] C:\Program Files\Acronis\TrueImage\TrueImageMonitor.exe
O4 - HKLM\..\Run: [ThrustTSR] C:\Program Files\Thrustmaster\Thrustmapper\TMTMTSR.exe
O4 - HKLM\..\Run: [SpySweeper] "C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe" /startintray
O4 - HKLM\..\Run: [PayTime] C:\WINDOWS\System32\paytime.exe
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NetPumper] "C:\Program Files\NetPumper\NetPumperIEProxy.exe"
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [find cdrom dumb film] C:\Documents and Settings\All Users\Application Data\DashKnobFindCdrom\FreeSetup.exe
O4 - HKLM\..\Run: [eTrust PestPatrol Active Protection] none
O4 - HKLM\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [CloneCDTray] "C:\Program Files\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [AVG7_EMC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [Acronis Scheduler2 Service] "C:\Program Files\Fichiers communs\Acronis\Schedule2\schedhlp.exe"
O4 - HKCU\..\Run: [PopUpStopperFreeEdition] "C:\PROGRA~1\PANICW~1\POP-UP~1\PSFree.exe"
O4 - HKCU\..\Run: [Windows installer] C:\winstall.exe
O4 - HKCU\..\Run: [win online] C:\DOCUME~1\KENDAR\APPLIC~1\PURESH~1\ISO TEST.exe
O4 - HKCU\..\Run: [Shell] "C:\Program Files\Common Files\Microsoft Shared\Web Folders\ibm00001.exe"
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [Gestionnaire Antidote.exe] C:\PROGRA~1\Druide\Antidote\Antidote\Gestionnaire Antidote.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_05\bin\npjpi150_05.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_05\bin\npjpi150_05.dll
O9 - Extra button: Créer un Favori de l'appareil mobile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
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: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} (Creative Software AutoUpdate) - http://creative.com/su/ocx/15015/CTSUEng.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {54B52E52-8000-4413-BD67-FC7FE24B59F2} (EARTPatchX Class) - http://simcity.ea.com/update/EARTPX.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1129645127518
O16 - DPF: {C36661D7-3590-45B1-80B5-520839E94DAD} (MaxisSimCity4PatcherX Control) - http://simcity.ea.com/update/MaxisSimCity4PatcherX.cab
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://creative.com/su/ocx/15016/CTPID.cab
O20 - Winlogon Notify: msupdate - C:\WINDOWS\SYSTEM32\msupdate32.dll
O20 - Winlogon Notify: WRNotifier - WRLogonNTF.dll (file missing)
O21 - SSODL: EEDFJDHD - {4F7A4AE8-093D-0ACC-2529-3AEB454A14AB} - C:\WINDOWS\System32\Ejocaa32.dll (file missing)
O21 - SSODL: mtklefap - {23AD33E3-4496-4578-1CB1-739CC7D3CDED} - C:\WINDOWS\System32\zmdn32.dll (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe