Erreur chargement C ... MSA64CHK.DLL

Bonjour,
Acquis un nouveau PC avec Windows XP depuis 1 sem. et déjà un message d'erreur sur le fichier : c:windows\system32\MSA64CHK.DLL. Déjà essayé de le renommer et supprimer mais revient tjs !
J'ai lancé hijackthis et ai un rapport : ci-dessous

HELP !!
Sinon suis prete à reformater, ai les 2 cd pilotes ; mais comment faire exactement ?

MERCI BEAUCOUP
Mel.

Logfile of HijackThis v1.99.0
Scan saved at 22:16:15, on 20/01/2005
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\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
C:\WINDOWS\system32\nvsvc32.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Phoenix Technologies Ltd\RecoverPro_XP\VBPTASK.EXE
C:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\WINDOWS\AGRSMMSG.exe
C:\WINDOWS\system32\RunDll32.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
C:\PROGRA~1\ACDSYS~1\DEVDET~1\DEVDET~1.EXE
C:\Program Files\Fichiers communs\Talkway\vmtalk.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
c:\progra~1\mcafee.com\vso\mcvsftsn.exe
C:\Program Files\Club-Internet\Lanceur\lanceur.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\mshta.exe
C:\WINDOWS\system32\mshta.exe
C:\Program Files\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.club-internet.fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.123mania.com/040C/ie.asp
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Internet Explorer avec Club-Internet
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = HTTP=proxy.club-internet.fr:8080
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SrchHook Class - {15651C7C-E812-44a2-A9AC-B467A2233E7D} - C:\WINDOWS\system32\GIDCAI32.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: BHOsrc Class - {622CC208-B014-4FE0-801B-874A5E5E403A} - C:\WINDOWS\system32\GIDCAI32.dll
O2 - BHO: HTML Class - {9C5B2F29-1F46-4639-A6B4-828942301D3E} - C:\WINDOWS\system32\SIPSPI32.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O4 - HKLM\..\Run: [RestoreIT!] "C:\Program Files\Phoenix Technologies Ltd\RecoverPro_XP\VBPTASK.EXE" VBStart
O4 - HKLM\..\Run: [VSOCheckTask] "c:\PROGRA~1\mcafee.com\vso\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] C:\PROGRA~1\mcafee.com\agent\McUpdate.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [Raccourci vers la page des propriétés de High Definition Audio] HDAudPropShortcut.exe
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [fenaffiche] C:\Program Files\FenAffiche\Fenpowernet.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [VirusScan Online] "c:\PROGRA~1\mcafee.com\vso\mcvsshld.exe"
O4 - HKLM\..\Run: [Camera Detector] C:\PROGRA~1\ACDSYS~1\DEVDET~1\DEVDET~1.EXE -autorun
O4 - HKLM\..\Run: [vmtalk] C:\Program Files\Fichiers communs\Talkway\vmtalk.exe
O4 - HKLM\..\Run: [LoadSIPS] rundll32.exe C:\WINDOWS\system32\SIPSPI32.dll,SIPSPI32
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [NouvellesMP3] rundll32.exe C:\WINDOWS\system32\MSA64CHK.dll,DllMostrar Matrix_HTML:NouvellesMP3:t
O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra button: NouvellesMP3 - {76DD9E77-F06C-4471-AB6C-CF03C5C6B5B0} - C:\WINDOWS\system32\NouvellesMP3 (file missing)
O9 - Extra button: ChansonsMP3 - {EF6D6AE3-2625-40D6-A5AB-920DFD2DAF8C} - C:\Documents and Settings\Mélanie\Application Data\ChansonsMP3[1].exe (file missing)
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: fdjeux - https://www.fdjeux.net/classes/fdjeux.cab
O16 - DPF: {15651C7C-E812-44A2-A9AC-B467A2233E7D} (SrchHook Class) - http://portail.escritorioactivo.com/GIDCAI32.cab
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) - http://download.mcafee.com/molbin/shared/mcinsctl/fr/4,0,0,84/mcinsctl.cab
O16 - DPF: {88C51E90-8E9C-4C96-8A45-574D88B63FAF} (Matrix Class) - http://www.bocata.net/webs/FR_Pop1/aplicacion.cab
O16 - DPF: {9C5B2F29-1F46-4639-A6B4-828942301D3E} (HTML Class) - http://portail.escritorioactivo.com/SIPSPI32.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) - http://download.mcafee.com/molbin/shared/mcgdmgr/fr/1,0,0,21/mcgdmgr.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{FF82199A-BF3C-418A-A54D-2FB85681E70D}: NameServer = 194.117.200.10 194.117.200.15
O23 - Service: Service d'administration du Gestionnaire de disque logique - Unknown - C:\WINDOWS\System32\dmadmin.exe
O23 - Service: Journal des événements - Unknown - C:\WINDOWS\system32\services.exe
O23 - Service: Service COM de gravage de CD IMAPI - Unknown - C:\WINDOWS\system32\imapi.exe
O23 - Service: LexBce Server - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: McAfee.com McShield - Unknown - c:\PROGRA~1\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee SecurityCenter Update Manager - McAfee, Inc - C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: McAfee.com VirusScan Online Realtime Engine - Networks Associates Technology, Inc - c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
O23 - Service: Partage de Bureau à distance NetMeeting - Unknown - C:\WINDOWS\system32\mnmsrvc.exe
O23 - Service: NVIDIA Display Driver Service - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Plug-and-Play - Unknown - C:\WINDOWS\system32\services.exe
O23 - Service: PsShutdown - Systems Internals - C:\WINDOWS\System32\PSSDNSVC.EXE
O23 - Service: Gestionnaire de session d'aide sur le Bureau à distance - Unknown - C:\WINDOWS\system32\sessmgr.exe
O23 - Service: Carte à puce - Unknown - C:\WINDOWS\System32\SCardSvr.exe
O23 - Service: Journaux et alertes de performance - Unknown - C:\WINDOWS\system32\smlogsvc.exe
O23 - Service: Cliché instantané de volume - Unknown - C:\WINDOWS\System32\vssvc.exe
O23 - Service: Carte de performance WMI - Unknown - C:\WINDOWS\system32\wbem\wmiapsrv.exe