Pourquoi mon ordi redemare tout seul ????

Bonjour,
Ecouter, il y a une demi heure je jouais a UT3 ( unreal tournament ) et l'ordi decide se de fermer tout seul.... et la , il y a cinq minutes je chat sur msn sans rien faire d'autre et mon ordi ferme tout seul.........

je ne c'est pas quest-ce qui se passe... en temps normal , l'ordi est capable de detecter un probleme au niveau des programme par example ( ERREUR CRITIQUE DANS WINDOW) mais c pas le cas... so la je vais vous envoyer mon HIJACKTHIS et dites moi quest-ce ce que je dois faire
je remercie d'avance L'equipe
voila

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:16:00, on 2008-02-07
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16574)
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\svchost.exe
C:\Program Files\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\ehome\ehtray.exe
C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
C:\Program Files\HP DigitalMedia Archive\DMAScheduler.exe
C:\Program Files\Lavasoft\Ad-Aware SE Professional\Ad-Watch.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\Xfire\xfire.exe
C:\WINDOWS\arservice.exe
C:\WINDOWS\eHome\ehRecvr.exe
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Common Files\LightScribe\LSSrvc.exe
C:\Program Files\NVIDIA Corporation\nTune\nTuneService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\PnkBstrA.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Common Files\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Common Files\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Common Files\Softwin\BitDefender Update Service\livesrv.exe
C:\Program Files\Softwin\BitDefender10\vsserv.exe
C:\WINDOWS\system32\dllhost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\eHome\ehmsas.exe
C:\HP\KBD\KBD.EXE
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\wuauclt.exe
c:\windows\system\hpsysdrv.exe
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
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 Bar = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
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 = http://hp-consumer.my.aol.ca/?icid=desktop
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: hpWebHelper Class - {AAAE832A-5FFF-4661-9C8F-369692D1DCB9} - C:\WINDOWS\pchealth\helpctr\Vendors\CN=Hewlett-Packard,L=Cupertino,S=Ca,C=US\plugin\WebHelper.dll
O4 - HKLM\..\Run: [ehTray] C:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
O4 - HKLM\..\Run: [Recguard] C:\WINDOWS\SMINST\RECGUARD.EXE
O4 - HKLM\..\Run: [ftutil2] rundll32.exe ftutil2.dll,SetWriteCacheMode
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [DMAScheduler] "c:\Program Files\HP DigitalMedia Archive\DMAScheduler.exe"
O4 - HKLM\..\Run: [AWMON] "C:\Program Files\Lavasoft\Ad-Aware SE Professional\Ad-Watch.exe"
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [AlwaysReady Power Message APP] ARPWRMSG.EXE
O4 - HKLM\..\Run: [ccApp] "c:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [HPBootOp] "C:\Program Files\Hewlett-Packard\HP Boot Optimizer\HPBootOp.exe" /run
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKUS\S-1-5-18\..\RunOnce: [RunNarrator] Narrator.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [RunNarrator] Narrator.exe (User 'Default user')
O4 - S-1-5-18 Startup: Xfire.lnk = C:\Program Files\Xfire\xfire.exe (User 'SYSTEM')
O4 - .DEFAULT Startup: Xfire.lnk = C:\Program Files\Xfire\xfire.exe (User 'Default user')
O4 - .DEFAULT User Startup: Pin.lnk = C:\hp\bin\CLOAKER.EXE (User 'Default user')
O4 - .DEFAULT User Startup: PinMcLnk.lnk = C:\hp\bin\cloaker.exe (User 'Default user')
O4 - Startup: Xfire.lnk = C:\Program Files\Xfire\xfire.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe (file missing)
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: Internet Connection Help - {E2D4D26B-0180-43a4-B05F-462D6D54C789} - C:\WINDOWS\PCHEALTH\HELPCTR\Vendors\CN=Hewlett-Packard,L=Cupertino,S=Ca,C=US\IEButton\support.htm
O9 - Extra 'Tools' menuitem: Internet Connection Help - {E2D4D26B-0180-43a4-B05F-462D6D54C789} - C:\WINDOWS\PCHEALTH\HELPCTR\Vendors\CN=Hewlett-Packard,L=Cupertino,S=Ca,C=US\IEButton\support.htm
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
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
O15 - Trusted Zone: http://download.windowsupdate.com
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} (QuickTime Object) - http://a1540.g.akamai.net/7/1540/52/20070711/qtinstall.info.apple.com/qtactivex/qtplugin.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w2/resources/MSNPUpld.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-CA/a-UNO1/GAME_UNO1.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {67A5F8DC-1A4B-4D66-9F24-A704AD929EEE} (System Requirements Lab) - http://www.systemrequirementslab.com/sysreqlab2.cab
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) - http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {74DBCB52-F298-4110-951D-AD2FF67BC8AB} (NVIDIA Smart Scan) - https://www.nvidia.com/content/DriverDownload/nforce/NvidiaSmartScan.cab
O16 - DPF: {867E13F2-7F31-44FB-AC97-CD38E0DC46EF} - http://charon777.free.fr/plugins/hardwaredetection_2_0_4_9.cab
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (MSN Games - Installer) - http://messenger.zone.msn.com/binary/ZIntro.cab56649.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {CF40ACC5-E1BB-4AFF-AC72-04C2F616BCA7} (get_atlcom Class) - http://www.adobe.com/products/acrobat/nos/gp.cab
O16 - DPF: {E6187999-9FEC-46A1-A20F-F4CA977D5643} (ZoneChess Object) - http://messenger.zone.msn.com/binary/Chess.cab57176.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{1FEE6FA8-DBE4-4A9B-B0DB-CD3D4108E663}: NameServer = 64.235.193.5 64.235.193.6
O17 - HKLM\System\CS1\Services\Tcpip\..\{1FEE6FA8-DBE4-4A9B-B0DB-CD3D4108E663}: NameServer = 64.235.193.5 64.235.193.6
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Common Files\Softwin\BitDefender Scan Server\bdss.exe
O23 - Service: Convar task manager (ctm) - Convar Deutschland GmbH - C:\Program Files\Convar\TaskManager\ctm.exe
O23 - Service: FSGuard Service - convar europe ltd. - C:\Program Files\Convar\FSGuard\FSGS.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: BitDefender Desktop Update Service (LIVESRV) - SOFTWIN S.R.L. - C:\Program Files\Common Files\Softwin\BitDefender Update Service\livesrv.exe
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Program Files\Common Files\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: nTune Service (nTuneService) - NVIDIA - C:\Program Files\NVIDIA Corporation\nTune\nTuneService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - SOFTWIN S.R.L. - C:\Program Files\Softwin\BitDefender10\vsserv.exe
O23 - Service: BitDefender Communicator (XCOMM) - SOFTWIN S.R.L - C:\Program Files\Common Files\Softwin\BitDefender Communicator\xcommsvr.exe