Programme se ferment tout seul

Bonjours,

voila depuis un certain temps mon pc bug :

lorsque je lance iE ou firefox il se ferment tout seul au bout d'un certain temps ( aléatoire )

c'est la meme chose pour les programme ( everest poker )

je n'ai pas tester sur les jeux .

je poste ici un rapport du hijackthis

si quelqu'un pouvais m'éclairé

Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 20:12:47, on 24/07/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
Boot mode: Normal

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\Ati2evxx.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\Windows Defender\MsMpEng.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\Ati2evxx.exe
D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
D:\Program Files\Alwil Software\Avast4\ashServ.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\Explorer.EXE
D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
D:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
D:\WINDOWS\system32\LVCOMSX.EXE
D:\Program Files\Logitech\Video\LogiTray.exe
D:\Program Files\Windows Defender\MSASCui.exe
D:\Program Files\iTunes\iTunesHelper.exe
D:\WINDOWS\system32\sstray.exe
D:\WINDOWS\system32\atiptaxx.exe
D:\Program Files\ATI Multimedia\main\launchpd.exe
D:\Program Files\ATI Multimedia\main\ATIDtct.EXE
D:\WINDOWS\system32\devldr32.exe
D:\Program Files\Pinnacle\Shared Files\Programs\Scheduler\PCLEScheduler.exe
D:\Program Files\Logitech\Video\FxSvr2.exe
D:\Program Files\yProxy\yProxy.exe
D:\Program Files\KeirNet\K9\K9.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
D:\Program Files\iPod\bin\iPodService.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Mozilla Firefox\firefox.exe
D:\WINDOWS\system32\taskmgr.exe
D:\Documents and Settings\papa.XPSP2-ABEF1CCEF\Bureau\HiJackThis_v2.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.google.fr/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.google.fr/?gws_rd=ssl
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.fr/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.google.fr/keyword/%s
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Canon Easy Web Print Helper - {68F9551E-0411-48E4-9AAF-4BC42A6A46BE} - D:\Program Files\Canon\Easy-WebPrint\EWPBrowseLoader.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - D:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O3 - Toolbar: Easy-WebPrint - {327C2873-E90D-4c37-AA9D-10AC9BABA46C} - D:\Program Files\Canon\Easy-WebPrint\Toolband.dll
O4 - HKLM\..\Run: [avast!] D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "D:\Program Files\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [LVCOMSX] D:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] D:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] D:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [Windows Defender] "D:\Program Files\Windows Defender\MSASCui.exe" -hide
O4 - HKLM\..\Run: [QuickTime Task] "D:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "D:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [nForce Tray Options] sstray.exe /r
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [StartCCC] D:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "D:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [ATI Launchpad] "D:\Program Files\ATI Multimedia\main\launchpd.exe"
O4 - HKCU\..\Run: [ATI DeviceDetect] D:\Program Files\ATI Multimedia\main\ATIDtct.EXE
O4 - HKUS\S-1-5-19\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'Default user')
O4 - Startup: Launch K9.lnk = E:\Program Files\KeirNet\K9\K9.exe
O4 - Global Startup: Adobe Reader Synchronizer.lnk = D:\Program Files\Adobe\Reader 8.0\Reader\AdobeCollabSync.exe
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = D:\Program Files\Adobe\Reader 8.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Pinnacle Scheduler.lnk = D:\Program Files\Pinnacle\Shared Files\Programs\Scheduler\PCLEScheduler.exe
O4 - Global Startup: yProxy.lnk = D:\Program Files\yProxy\yProxy.exe
O8 - Extra context menu item: Easy-WebPrint Ajouter à la liste d'impressions - res://D:\Program Files\Canon\Easy-WebPrint\Toolband.dll/RC_AddToList.html
O8 - Extra context menu item: Easy-WebPrint Impression rapide - res://D:\Program Files\Canon\Easy-WebPrint\Toolband.dll/RC_HSPrint.html
O8 - Extra context menu item: Easy-WebPrint Imprimer - res://D:\Program Files\Canon\Easy-WebPrint\Toolband.dll/RC_Print.html
O8 - Extra context menu item: Easy-WebPrint Prévisualiser - res://D:\Program Files\Canon\Easy-WebPrint\Toolband.dll/RC_Preview.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: ATI TV - {44226DFF-747E-4edc-B30C-78752E50CD0C} - D:\Program Files\ATI Multimedia\dtv\EXPLBAR.DLL
O22 - SharedTaskScheduler: Pré-chargeur Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - D:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Démon de cache des catégories de composant - {8C7461EF-2B13-11d2-BE35-3078302C2030} - D:\WINDOWS\system32\browseui.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - D:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - D:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Service d'administration du Gestionnaire de disque logique (dmadmin) - Unknown owner - D:\WINDOWS\System32\dmadmin.exe
O23 - Service: Journal des événements (Eventlog) - Unknown owner - D:\WINDOWS\system32\services.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - D:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Plug-and-Play (PlugPlay) - Unknown owner - D:\WINDOWS\system32\services.exe
O23 - Service: Gestionnaire de session d'aide sur le Bureau à distance (RDSessMgr) - Unknown owner - D:\WINDOWS\system32\sessmgr.exe
O23 - Service: Cliché instantané de volume (VSS) - Unknown owner - D:\WINDOWS\System32\vssvc.exe