Mon ordi plante tout le temps

Bonjour,

Depuis quelques jours mon ordi s'éteint mais la diode d'allumage reste allumée.

Hijackthis me donne le rapport suivant :

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:\Program Files\Softwin\BitDefender8\bdmcon.exe
C:\Program Files\Softwin\BitDefender8\bdoesrv.exe
C:\Program Files\Softwin\BitDefender8\bdnagent.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\mem turbo2\memturbo.exe
C:\WINDOWS\System32\CTSvcCDA.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\MsPMSPSv.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Softwin\BitDefender8\vsserv.exe
C:\Mes téléchargements\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.direct-ecureuil.fr/ASP/modele1.asp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://home.fra.chello.fr/ssi/welcome/welcome.php?url=home&src=ie
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://fr.rd.yahoo.com/customize/ie/defaults/su/ymsgr6/fr/*http://fr.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://fr.rd.yahoo.com/customize/ie/defaults/su/ymsgr6/fr/*http://fr.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = ..: Pascal & Agnès :..
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = proxy.chello.fr:8080
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O4 - HKLM\..\Run: [IncrediMail] C:\PROGRA~1\INCRED~1\bin\IncMail.exe /c
O4 - HKLM\..\Run: [BDMCon] C:\Program Files\Softwin\BitDefender8\bdmcon.exe
O4 - HKLM\..\Run: [BDOESRV] C:\Program Files\Softwin\BitDefender8\bdoesrv.exe
O4 - HKLM\..\Run: [BDNewsAgent] C:\Program Files\Softwin\BitDefender8\bdnagent.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 - Startup: MemTurbo.lnk = C:\Program Files\mem turbo2\memturbo.exe
O4 - Startup: MemTurbo.lnk.disabled
O4 - Global Startup: Adobe Gamma Loader.lnk.disabled
O4 - Global Startup: Microsoft Office.lnk.disabled
O8 - Extra context menu item: &Add animation to IncrediMail Style Box - C:\PROGRA~1\INCRED~1\bin\resources\WebMenuImg.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.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
O14 - IERESET.INF: START_PAGE_URL=http://home.fra.chello.fr/ssi/welcome/welcome.php?url=home&src=ie
O16 - DPF: JT's Blocks - http://download.games.yahoo.com/games/clients/y/blt1_x.cab
O16 - DPF: teleir_cert - https://static.ir.dgi.minefi.gouv.fr/secure/connexion/archives/ie4n4/teleir_cert.cab
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab27571.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage) - http://go.microsoft.com/fwlink/?linkid=36467&clcid=0x409
O16 - DPF: {1D185838-009D-47C8-824B-B65B4854430E} (Installer Class) - http://quickfix2.chello.fr/quickfix2/asp/chelloInstall.CAB
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab28578.cab
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {4C39376E-FA9D-4349-BACC-D305C1750EF3} (EPUImageControl Class) - http://tools.ebayimg.com/eps/wl/activex/EPUWALControl_v1-0-3-17.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} (RdxIE Class) - http://software-dl.real.com/22a7eb6f5a62e9e53816/netzip/RdxIE601_fr.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan8/oscan8.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1120185093031
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {6A060448-60F9-11D5-A6CD-0002B31F7455} (ExentInf Class) -
O16 - DPF: {80DD2229-B8E4-4C77-B72F-F22972D723EA} (AvxScanOnline Control) - http://www.inoculer.com/antivirus/Msie/bitdefender.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab27571.cab
O16 - DPF: {BFF1950D-B1B4-4AE8-B842-B2CCF06D9A1B} (Zylom Games Player) - http://game16.zylomgames.com/activex/zylomgamesplayer.cab
O16 - DPF: {C58EFA10-2CC0-4C50-8C77-B326555EC1B7} (clsDefault Class) - http://quickfix2.chello.fr/quickfix2/asp/LaunchApp.CAB
O16 - DPF: {EF99BD32-C1FB-11D2-892F-0090271D4F88} - http://us.dl1.yimg.com/download.companion.yahoo.com/dl/toolbar/yiebio5_1_6_0.cab
O16 - DPF: {F00F4763-7355-4725-82F7-0DA94A256D46} (IMDownloader Class) - http://www2.incredimail.com/contents/setup/downloader/imloader.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab28177.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{4612F744-A54B-4709-9FFD-26B0F79B25A2}: NameServer = 212.186.224.9,212.186.224.10
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\System32\CTSvcCDA.EXE
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - Unknown owner - C:\Program Files\Softwin\BitDefender8\vsserv.exe" /service (file missing)
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)

Y a t-il quelque chose de suspect ?

Merci par avance.

Cordialement.