Obligation de reboot ! Pc bloqué

Bonjour,
Bonjour,
J'ai un souci avec mon pc. Il se bloque et plus aucune commande ne répond, je suis allé sur le forum hardware mais rien de plus. Je sais pas ce qui se passe. J'ai une version de windows ultimate je sais pas si c'est la raison mais il marchait très bien il y a encore quelques jours. J'ai utilisé antimalware, rsit, ccleaner et combofix mais mon problème reste entier. Qq'un aurait-il une idée ? est-ce que cela peut venir du disque dur ? Qd je reboot, il lui faut parfois plusieurs tentatives avant de redémarrer !!!

je colle le rapport
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:13:13, on 12/05/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\Program Files\Executive Software\Diskeeper\DkService.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Eset\nod32krn.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Eset\nod32kui.exe
C:\Program Files\Soft4Ever\looknstop\_looknstop.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
C:\Program Files\D-Link\D-Link Wireless N DWA-140\AirNCFG.exe
C:\Program Files\Microsoft IntelliPoint\ipoint.exe
C:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Lexmark X1100 Series\lxbkbmon.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe
C:\Program Files\UberIcon\UberIcon Manager.exe
C:\Windows\System32\VisualTaskTips.exe
C:\Program Files\TweakRAM\TweakRAM.exe
C:\Program Files\LClock\lclock.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Logitech\SetPoint\SetPoint.exe
C:\Documents and Settings\Administrateur\Application Data\Microsoft\Notification de cadeaux MSN\lsnfier.exe
C:\Program Files\Fichiers communs\Logishrd\KHAL2\KHALMNPR.EXE
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Documents and Settings\Administrateur\Bureau\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://ecofree.org/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [DiskeeperSystray] "C:\Program Files\Executive Software\Diskeeper\DkIcon.exe"
O4 - HKLM\..\Run: [nod32kui] "C:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [Look 'n' Stop] "C:\Program Files\Soft4Ever\looknstop\looknstop.exe" -auto
O4 - HKLM\..\Run: [Vistadrv] C:\WINDOWS\system32\Vistadrive\vsdrv.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [ANIWZCS2Service] C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
O4 - HKLM\..\Run: [D-Link D-Link Wireless N DWA-140] C:\Program Files\D-Link\D-Link Wireless N DWA-140\AirNCFG.exe
O4 - HKLM\..\Run: [IntelliPoint] "C:\Program Files\Microsoft IntelliPoint\ipoint.exe"
O4 - HKLM\..\Run: [Lexmark X1100 Series] "C:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe"
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [Kernel and Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\RunOnce: [WIAWizardMenu] RUNDLL32.EXE C:\WINDOWS\system32\sti_ci.dll,WiaCreateWizardMenu
O4 - HKCU\..\Run: [UberIcon] "C:\Program Files\UberIcon\UberIcon Manager.exe"
O4 - HKCU\..\Run: [VisualTaskTips] C:\Windows\System32\VisualTaskTips.exe
O4 - HKCU\..\Run: [Vistadrv] C:\Windows\System32\Vistadrive\vsdrv.exe
O4 - HKCU\..\Run: [TweakRAM] C:\Program Files\TweakRAM\TweakRAM.exe
O4 - HKCU\..\Run: [LClock] C:\Program Files\LClock\lclock.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-18\..\Run: [UberIcon] "C:\Program Files\UberIcon\UberIcon Manager.exe" (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [VisualTaskTips] C:\Windows\System32\VisualTaskTips.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [Vistadrv] C:\Windows\System32\Vistadrive\vsdrv.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [TweakRAM] C:\Program Files\TweakRAM\TweakRAM.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [LClock] C:\Program Files\LClock\lclock.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [UberIcon] "C:\Program Files\UberIcon\UberIcon Manager.exe" (User 'Default user')
O4 - Startup: Notification de cadeaux MSN.lnk = C:\Documents and Settings\Administrateur\Application Data\Microsoft\Notification de cadeaux MSN\lsnfier.exe
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\SetPoint.exe
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{977AE152-EC3E-45AF-839C-6956360B971B}: NameServer = 192.168.1.1
O23 - Service: ANIWZCSd Service (ANIWZCSdService) - Wireless Service - C:\Program Files\ANI\ANIWZCS2 Service\ANIWZCSdS.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Program Files\Executive Software\Diskeeper\DkService.exe
O23 - Service: GhostStartService - Symantec Corporation - C:\Program Files\Symantec\Norton Ghost 2003\GhostStartService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Fichiers communs\Logishrd\Bluetooth\LBTServ.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Ma-Config Service (maconfservice) - CybelSoft - C:\Program Files\ma-config.com\maconfservice.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Program Files\Eset\nod32krn.exe
End of file - 7439 bytes

Configuration: Windows XP
Firefox 3.0.10