Plantation de mon PC

Bonjour,
ça fait plus que 9mois mon PC se plante(blocage de la barre des tâches surtout)! j'ai essayé de le formater plusieurs fois mais le problème reste toujours. j'ai essayé de suivre les étapes expliquées et voila le rapport donné par HijackThis. Merci d'avance

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 23:45:31, on 26/02/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16791)
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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\WLTRYSVC.EXE
C:\WINDOWS\System32\bcmwltry.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
C:\WINDOWS\system32\IoctlSvc.exe
C:\Program Files\SigmaTel\C-Major Audio\DellXPM_5515v133\WDM\STacSV.exe
C:\WINDOWS\system32\WLTRAY.exe
C:\Program Files\Dell\QuickSet\quickset.exe
C:\Program Files\SigmaTel\C-Major Audio\WDM\stsystra.exe
C:\WINDOWS\tsnp325.exe
C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb07.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\igfxpers.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\WINDOWS\System32\mesgdis.exe
C:\windows\ffpext\ffpsrv.exe
C:\Program Files\DellTPad\Apoint.exe
C:\WINDOWS\LockStatusTray.exe
C:\WINDOWS\system32\igfxsrvc.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Internet Download Manager\IDMan.exe
C:\Program Files\DellTPad\ApMsgFwd.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Transform XP to Vista\Yahoo! Widgets\Widgets\YahooWidgetEngine.exe
C:\Program Files\DellTPad\Apntex.exe
C:\Program Files\DellTPad\HidFind.exe
C:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
C:\Program Files\Ela-Salaty\Salaty.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Program Files\Internet Download Manager\IEMonitor.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Transform XP to Vista\Yahoo! Widgets\Widgets\YahooWidgetEngine.exe
C:\Program Files\LG Electronics\Modem USB LG Electronics\IEUM.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R3 - URLSearchHook: PHPNukeFR Toolbar - {258fe8b8-a13c-4b91-9a0c-c2d3cab8b990} - C:\Program Files\PHPNukeFR\tbPHPN.dll
O2 - BHO: IDM Helper - {0055C089-8582-441B-A0BF-17B458C2A3A8} - C:\Program Files\Internet Download Manager\IDMIECC.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: PHPNukeFR Toolbar - {258fe8b8-a13c-4b91-9a0c-c2d3cab8b990} - C:\Program Files\PHPNukeFR\tbPHPN.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Program Files\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.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: PHPNukeFR Toolbar - {258fe8b8-a13c-4b91-9a0c-c2d3cab8b990} - C:\Program Files\PHPNukeFR\tbPHPN.dll
O4 - HKLM\..\Run: [Broadcom Wireless Manager UI] C:\WINDOWS\system32\WLTRAY.exe
O4 - HKLM\..\Run: [Dell QuickSet] C:\Program Files\Dell\QuickSet\quickset.exe
O4 - HKLM\..\Run: [SigmatelSysTrayApp] %ProgramFiles%\SigmaTel\C-Major Audio\WDM\stsystra.exe
O4 - HKLM\..\Run: [tsnp325] C:\WINDOWS\tsnp325.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb07.exe
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [task manager] C:\WINDOWS\System32\mesgdis.exe
O4 - HKLM\..\Run: [ffpsrv] c:\windows\ffpext\ffpsrv.exe
O4 - HKLM\..\Run: [Apoint] C:\Program Files\DellTPad\Apoint.exe
O4 - HKLM\..\Run: [LockStatusTray] C:\WINDOWS\LockStatusTray.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [IDMan] C:\Program Files\Internet Download Manager\IDMan.exe /onboot
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [YahooWidgetEngine.exe] "C:\Program Files\Transform XP to Vista\Yahoo! Widgets\Widgets\YahooWidgetEngine.exe"
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [cdoosoft] C:\WINDOWS\system32\olhrwef.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RESEAU')
O4 - HKUS\S-1-5-20\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVICE RESEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O4 - Startup: Ela-Salaty.lnk = C:\Program Files\Ela-Salaty\Salaty.exe
O8 - Extra context menu item: Ajouter à Kaspersky Anti-Bannière - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 7.0\ie_banner_deny.htm
O8 - Extra context menu item: Translate with &Babylon - res://D:\Program Files\Babylon\Babylon-Pro\Utils\BabylonIEPI.dll/Translate.htm
O8 - Extra context menu item: Télécharger avec IDM - C:\Program Files\Internet Download Manager\IEExt.htm
O8 - Extra context menu item: Télécharger le contenu de video FLV avec IDM - C:\Program Files\Internet Download Manager\IEGetVL.htm
O8 - Extra context menu item: Télécharger tous les liens avec IDM - C:\Program Files\Internet Download Manager\IEGetAll.htm
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
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://download.bitdefender.com/resources/scan8/oscan8.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{7B2B8824-2742-42E4-91C5-AD55917B0AE3}: NameServer = 192.168.50.55 196.12.209.5
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.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: PLFlash DeviceIoControl Service - Prolific Technology Inc. - C:\WINDOWS\system32\IoctlSvc.exe
O23 - Service: SigmaTel Audio Service (STacSV) - SigmaTel, Inc. - C:\Program Files\SigmaTel\C-Major Audio\DellXPM_5515v133\WDM\STacSV.exe
O23 - Service: TuneUp Drive Defrag Service (TuneUp.Defrag) - TuneUp Software GmbH - C:\WINDOWS\System32\TuneUpDefragService.exe
O23 - Service: Dell Wireless WLAN Tray Service (wltrysvc) - Unknown owner - C:\WINDOWS\System32\WLTRYSVC.EXE