MAJ et scan d'antivir impossible

Bonjour,
Depuis 2 jours je n'arrive pas à faire de MAJ d'antivir, ni à lancer le scan. Malwarebytes n'a apparemment rien détecté. est-ce que quelqu'un pourrait vérifier si je n'ai pas d'infection? merci d'avance de votre aide!

Logfile of HijackThis v1.99.0
Scan saved at 10:39:47, on 23/08/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16876)

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\Explorer.EXE
D:\WINDOWS\system32\spoolsv.exe
D:\Program Files\Avira\AntiVir Desktop\sched.exe
D:\Program Files\Avira\AntiVir Desktop\avguard.exe
D:\Program Files\Analog Devices\Core\smax4pnp.exe
D:\Program Files\Analog Devices\SoundMAX\Smax4.exe
D:\WINDOWS\system32\winsys2.exe
D:\Program Files\Avira\AntiVir Desktop\avgnt.exe
D:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIADE.EXE
D:\WINDOWS\system32\RUNDLL32.EXE
D:\WINDOWS\system32\LVCOMSX.EXE
D:\Program Files\Java\jre6\bin\jusched.exe
D:\Program Files\Fichiers communs\ArcSoft\Connection Service\Bin\ACDaemon.exe
D:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
D:\WINDOWS\system32\ctfmon.exe
D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
D:\Program Files\Messenger\msmsgs.exe
D:\Program Files\Fichiers communs\ArcSoft\Connection Service\Bin\ACService.exe
D:\WINDOWS\system32\cisvc.exe
D:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
D:\Program Files\Java\jre6\bin\jqs.exe
D:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
D:\WINDOWS\system32\nvsvc32.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
D:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
D:\WINDOWS\system32\wbem\wmiapsrv.exe
D:\Program Files\Avira\AntiVir Desktop\update.exe
D:\WINDOWS\system32\cidaemon.exe
D:\Program Files\Windows Live\Messenger\msnmsgr.exe
D:\Program Files\Windows Live\Contacts\wlcomm.exe
D:\DOCUME~1\nous\LOCALS~1\Temp\Répertoire temporaire 1 pour hijackthis.zip\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - D:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - D:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - D:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [SoundMAXPnP] D:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SoundMAX] "D:\Program Files\Analog Devices\SoundMAX\Smax4.exe" /tray
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE D:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SW20] D:\WINDOWS\system32\sw20.exe
O4 - HKLM\..\Run: [SW24] D:\WINDOWS\system32\sw24.exe
O4 - HKLM\..\Run: [WinSys2] D:\WINDOWS\system32\winsys2.exe
O4 - HKLM\..\Run: [avgnt] "D:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [EPSON Stylus DX4800 Series] D:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIADE.EXE /P26 "EPSON Stylus DX4800 Series" /O6 "USB001" /M "Stylus DX4800"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "D:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE D:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [LVCOMSX] D:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [SunJavaUpdateSched] "D:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [ArcSoft Connection Service] D:\Program Files\Fichiers communs\ArcSoft\Connection Service\Bin\ACDaemon.exe
O4 - HKLM\..\Run: [ZoneAlarm Client] "D:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] D:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\isuspm.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "D:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKCU\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "D:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [SpybotSD TeaTimer] D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [MSMSGS] "D:\Program Files\Messenger\msmsgs.exe" /background
O4 - Global Startup: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://D:\WINDOWS\system32\GPhotos.scr/200
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O11 - Options group: [INTERNATIONAL] International*
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: wlmailhtml - {03C514A3-1EFB-4856-9F99-10D7BE1653C0} - D:\Program Files\Windows Live\Mail\mailcomm.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - D:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: ArcSoft Connect Daemon - ArcSoft Inc. - D:\Program Files\Fichiers communs\ArcSoft\Connection Service\Bin\ACService.exe
O23 - Service: Avira AntiVir Planificateur - Avira GmbH - D:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard - Avira GmbH - D:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Service d'administration du Gestionnaire de disque logique - Unknown - D:\WINDOWS\System32\dmadmin.exe
O23 - Service: Journal des événements - Unknown - D:\WINDOWS\system32\services.exe
O23 - Service: Forceware Web Interface - Apache Software Foundation - D:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
O23 - Service: Google Updater Service - Google - D:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Service COM de gravage de CD IMAPI - Unknown - D:\WINDOWS\system32\imapi.exe
O23 - Service: Java Quick Starter - Sun Microsystems, Inc. - D:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Partage de Bureau à distance NetMeeting - Unknown - D:\WINDOWS\system32\mnmsrvc.exe
O23 - Service: ForceWare IP service - NVIDIA Corporation - D:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
O23 - Service: ForceWare user log service - NVIDIA Corporation - D:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
O23 - Service: NVIDIA Display Driver Service - NVIDIA Corporation - D:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Plug-and-Play - Unknown - D:\WINDOWS\system32\services.exe
O23 - Service: Gestionnaire de session d'aide sur le Bureau à distance - Unknown - D:\WINDOWS\system32\sessmgr.exe
O23 - Service: Carte à puce - Unknown - D:\WINDOWS\System32\SCardSvr.exe
O23 - Service: Journaux et alertes de performance - Unknown - D:\WINDOWS\system32\smlogsvc.exe
O23 - Service: TrueVector Internet Monitor - Check Point Software Technologies LTD - D:\WINDOWS\system32\ZoneLabs\vsmon.exe
O23 - Service: Cliché instantané de volume - Unknown - D:\WINDOWS\System32\vssvc.exe
O23 - Service: Carte de performance WMI - Unknown - D:\WINDOWS\system32\wbem\wmiapsrv.exe