ARRET INOPINE DU PC!!!

Bonjour,
depuis plusieurs jours mon pc s'arrete inopinement l ecran deviiint noir d un seul coup et l unite centrale s eteind de maniere aleatoireil faut souvent que je debranche la prise et la rebranche et la encore il faut que j appuie plusieurs fois sur le bouton demarrer mais a la suite de ces incidents j ai a l ecranle choix entre les modes de demarrage sans echec...
j ai essayé plusieurs analyse antivirus mais bien souvent je n arrive pas au bout car le pc s arrete j ai réussi a faire scan online bit defender mais je n ai pu recuperer le rapport ;ma femme l ayant fermer a son terme et il n y avait rien; la je fais encore norton scan et c est propre.Par contre j ai avast 4.8 et je n arrive pas a aller jusqu au bout du scan je me demande si cela ne vient pas de la mise a jour de windows SP3? j ai regardé dans les forums mais je ne trouve pas la solution lorsque je touchhhh la carcasse il reste froid pour moi il ne chauffe pas mais je ne sais comment l on fait pour voir la temperature du processeur ou encore de la CPU
mon pc est un medion il a 2 ans Pentium D ;3go CPU; 1go de RAM; refroidi par un double flux d air selon fabricant
voici rapport hijackthis:
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19:08:46, on 29/05/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
Boot mode: Normal

Running processes:
C:\windows\System32\smss.exe
C:\windows\system32\csrss.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\svchost.exe
C:\windows\system32\svchost.exe
C:\windows\system32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\windows\system32\spoolsv.exe
C:\windows\system32\agrsmsvc.exe
C:\Program Files\Home Cinema\PowerCinema\Kernel\TV\CLCapSvc.exe
C:\Program Files\Home Cinema\PowerCinema\Kernel\CLML_NTService\CLMLServer.exe
C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
C:\windows\System32\svchost.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
C:\windows\system32\nvsvc32.exe
C:\windows\system32\IoctlSvc.exe
C:\Program Files\CyberLink\Shared Files\RichVideo.exe
C:\windows\System32\snmp.exe
C:\windows\system32\svchost.exe
C:\PROGRA~1\COMMON~1\X10\Common\x10nets.exe
C:\Program Files\Windows Media Player\WMPNetwk.exe
C:\Program Files\Home Cinema\PowerCinema\Kernel\TV\CLSched.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\windows\System32\alg.exe
C:\windows\Explorer.EXE
C:\windows\system32\CmUCReye.exe
C:\windows\mHotkey.exe
C:\windows\CNYHKey.exe
C:\Program Files\Home Cinema\PowerCinema\PCMService.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\windows\RTHDCPL.EXE
C:\Program Files\USB Disk Win98 Driver\Res.EXE
C:\Program Files\Nero\Nero8\Nero BackItUp\NBKeyScan.exe
C:\windows\system32\ctfmon.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\PROGRA~1\MI3AA1~1\rapimgr.exe
C:\Program Files\Google\Google Updater\GoogleUpdater.exe
C:\Program Files\RALINK\RT2500 USB Wireless LAN Card\Installer\WINXP\RaConfig2500.exe
C:\Program Files\Club-Internet\Lanceur\lanceur.exe
C:\Program Files\Club-Internet\Le Compagnon Club\bin\mpbtn.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\windows\system32\csrss.exe
C:\windows\system32\winlogon.exe
C:\windows\Explorer.EXE
C:\windows\system32\CmUCReye.exe
C:\windows\mHotkey.exe
C:\windows\CNYHKey.exe
C:\Program Files\Home Cinema\PowerCinema\PCMService.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\windows\RTHDCPL.EXE
C:\Program Files\USB Disk Win98 Driver\Res.EXE
C:\windows\system32\ctfmon.exe
C:\Program Files\Microsoft ActiveSync\wcescomm.exe
C:\Program Files\Windows Live\Mail\wlmail.exe
C:\PROGRA~1\MI3AA1~1\rapimgr.exe
C:\Program Files\SuperCopier2\SuperCopier2.exe
C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
C:\Program Files\Fichiers communs\SmartCom\RTEGPRS.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\Program Files\Google\Google Updater\GoogleUpdater.exe
C:\Program Files\RALINK\RT2500 USB Wireless LAN Card\Installer\WINXP\RaConfig2500.exe
C:\Program Files\Club-Internet\Le Compagnon Club\bin\mpbtn.exe
C:\Program Files\Nero\Nero8\Nero StartSmart\NeroStartSmart.exe
C:\Program Files\Fichiers communs\Nero\Lib\NMIndexStoreSvr.exe
C:\Program Files\Fichiers communs\Nero\Lib\NMIndexingService.exe
C:\Program Files\Nero\Nero8\Nero Burning Rom\nero.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://actus.sfr.fr
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Windows Internet Explorer optimisé pour MSN
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (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: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.1.615.5858\swg.dll
O3 - Toolbar: Share Accelerator Toolbar - {f5c93451-2609-4723-a053-5c19516be1a8} - C:\Program Files\Share_Accelerator\tbShar.dll
O3 - Toolbar: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [CmUCRRun] C:\windows\system32\CmUCReye.exe
O4 - HKLM\..\Run: [CHotkey] mHotkey.exe
O4 - HKLM\..\Run: [ledpointer] CNYHKey.exe
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Home Cinema\PowerCinema\PCMService.exe"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [USB Storage Toolbox] C:\Program Files\USB Disk Win98 Driver\Res.EXE
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NBKeyScan] "C:\Program Files\Nero\Nero8\Nero BackItUp\NBKeyScan.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Program Files\Fichiers communs\Nero\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKCU\..\Run: [ctfmon.exe] C:\windows\system32\ctfmon.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\wcescomm.exe"
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [SuperCopier2.exe] C:\Program Files\SuperCopier2\SuperCopier2.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [RTEGPRS] "C:\Program Files\Fichiers communs\SmartCom\RTEGPRS.exe" tray
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime (User 'DELPHINE')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe (User 'DELPHINE')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\wcescomm.exe" (User 'DELPHINE')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [Spyware Doctor] C:\PROGRA~1\SPYWAR~2\swdoctor.exe /Q (User 'DELPHINE')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [Eyeball Chat] "C:\PROGRA~1\Eyeball\EYEBAL~1\EyeballChat.exe" -min (User 'DELPHINE')
O4 - HKUS\S-1-5-21-1705156641-3219342812-2856091799-1007\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe (User 'DELPHINE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - S-1-5-21-1705156641-3219342812-2856091799-1007 Startup: Club Internet.lnk = C:\Program Files\Club-Internet\Lanceur\lanceur.exe (User 'DELPHINE')
O4 - S-1-5-21-1705156641-3219342812-2856091799-1007 User Startup: Club Internet.lnk = C:\Program Files\Club-Internet\Lanceur\lanceur.exe (User 'DELPHINE')
O4 - Global Startup: Accélérateur de démarrage AutoCAD.lnk = C:\Program Files\Fichiers communs\Autodesk Shared\acstart16.exe
O4 - Global Startup: LE COMPAGNON CLUB.lnk = C:\Program Files\Club-Internet\Le Compagnon Club\bin\matcli.exe
O4 - Global Startup: Outil de mise à jour Google.lnk = C:\Program Files\Google\Google Updater\GoogleUpdater.exe
O4 - Global Startup: Ralink Wireless Utility.lnk = C:\Program Files\RALINK\RT2500 USB Wireless LAN Card\Installer\WINXP\RaConfig2500.exe
O8 - Extra context menu item: &eBay Search - res://C:\Program Files\eBay\eBay Toolbar2\eBayTb.dll/RCSearch.html
O8 - Extra context menu item: &Recherche AOL Toolbar - res://C:\Program Files\AOL Toolbar\toolbar.dll/SEARCH.HTML
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: Create Mobile Favorite - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\windows\bdoscandel.exe
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\windows\bdoscandel.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
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: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan_fr/scan8/oscan8.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {6E5E167B-1566-4316-B27F-0DDAB3484CF7} (Image Uploader Control) - https://secure.photobox.com/assets/aurigma/ImageUploader4.cab
O16 - DPF: {88764F69-3831-4EC1-B40B-FF21D8381345} (AdVerifierADPCtrl Class) - https://static.impots.gouv.fr/tdir/static/adpform/AdSignerADP-1.1.cab
O16 - DPF: {A73BAEFA-EE65-494D-BEDB-DD3E5A34FA98} (Image Uploader) - http://www.extrafilm.fr/ImageUploader4.cab
O16 - DPF: {BB21F850-63F4-4EC9-BF9D-565BD30C9AE9} (a-squared Scanner) - http://ax.emsisoft.com/asquared.cab
O22 - SharedTaskScheduler: IE Component Categories cache daemon - {553858A7-4922-4e7e-B1C1-97140C1C16EF} - C:\WINDOWS\system32\ieframe.dll
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\windows\system32\agrsmsvc.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Fichiers communs\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: CyberLink Background Capture Service (CBCS) (CLCapSvc) - Unknown owner - C:\Program Files\Home Cinema\PowerCinema\Kernel\TV\CLCapSvc.exe
O23 - Service: CyberLink Task Scheduler (CTS) (CLSched) - Unknown owner - C:\Program Files\Home Cinema\PowerCinema\Kernel\TV\CLSched.exe
O23 - Service: CyberLink Media Library Service - Cyberlink - C:\Program Files\Home Cinema\PowerCinema\Kernel\CLML_NTService\CLMLServer.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Fichiers communs\Nero\Lib\NMIndexingService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\windows\system32\nvsvc32.exe
O23 - Service: PLFlash DeviceIoControl Service - Prolific Technology Inc. - C:\windows\system32\IoctlSvc.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files\CyberLink\Shared Files\RichVideo.exe
O23 - Service: X10 Device Network Service (x10nets) - X10 - C:\PROGRA~1\COMMON~1\X10\Common\x10nets.exe