mon ordinateur est devenu très lent

Bonjour ! depuis quelque temps, j'ai un problème avec mon ordi : il rame. J'ai effectué recherche virus, trojan etc, defragmentatio et rien n'y fait. Pouvez m aider svp à le rendre plus dynamique. Voici le rapport de hijackthis si ça vous sert à quelque chose. merci d'avance.


Logfile of HijackThis v1.99.1
Scan saved at 16:36:26, on 27/05/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)

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:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
c:\program files\fichiers communs\logitech\lvmvfm\LVPrcSrv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Electronic Arts\Need for Speed

ProStreet\PB\PnkBstrA.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\Analog Devices\SoundMAX\Smax4.exe
C:\Program Files\Java\jre1.5.0_09\bin\jusched.exe
C:\Program Files\Thrustmaster\Thrustmapper\TMTMTSR.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\BitTorrent\bittorrent.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\palmOne\Hotsync.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\Program Files\Java\jre1.5.0_09\bin\jucheck.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WinRAR\WinRAR.exe
C:\WinRAR\WinRAR.exe
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\Rar$EX00.969\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar =

http://recherche.neuf.fr/ie/default.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =

http://www.google.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =

http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =

http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL

= http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =

http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =

http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =

http://www.google.fr/ie
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) =

http://www.google.fr/keyword/%s
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext =

http://www.google.fr/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName

= Liens
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up -

{EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
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_02\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
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE

C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [avast!] C:\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE

C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [High Definition Audio Property Page Shortcut]

HDAShCut.exe
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog

Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SoundMAX] "C:\Program Files\Analog

Devices\SoundMAX\Smax4.exe" /tray
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program

Files\Java\jre1.5.0_09\bin\jusched.exe"
O4 - HKLM\..\Run: [ThrustTSR] C:\Program

Files\Thrustmaster\Thrustmapper\TMTMTSR.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BitTorrent] "C:\Program

Files\BitTorrent\bittorrent.exe" --force_start_minimized
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows

Live\Messenger\msnmsgr.exe" /background
O4 - Global Startup: HotSync Manager.lnk = C:\Program

Files\palmOne\Hotsync.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program

Files\HP\Digital Imaging\bin\hpqtra08.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel -

res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} -

C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) -

{08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program

Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: Ajout Direct -

{219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows

Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer -

{219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows

Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} -

%windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 -

{85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file

missing)
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} -

C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} -

%windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 -

{e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network

Diagnostic\xpnetdiag.exe (file missing)
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash

Object) -

http://fpdownload2.macromedia.com/get/shockwave/cabs/fl...
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} -

C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} -

C:\Program Files\Fichiers communs\Microsoft Shared\Help\hxds.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} -

C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: wlmailhtml - {03C514A3-1EFB-4856-9F99-10D7BE1653C0} -

C:\Program Files\Windows Live\Mail\mailcomm.dll
O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945}

- C:\PROGRA~1\FICHIE~1\MICROS~1\OFFICE12\MSOXMLMF.DLL
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} -

C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Avira AntiVir Personal – Free Antivirus Scheduler

(AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir

PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal – Free Antivirus Guard

(AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir

PersonalEdition Classic\avguard.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software

- C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program

Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program

Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program

Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
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\11\Intel 32\IDriverT.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. -

C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Logitech Process Monitor (LVPrcSrv) - Logitech Inc. -

c:\program files\fichiers communs\logitech\lvmvfm\LVPrcSrv.exe
O23 - Service: LVSrvLauncher - Logitech Inc. - C:\Program

Files\Fichiers communs\Logitech\SrvLnch\SrvLnch.exe
O23 - Service: NBService - Nero AG - C:\Program Files\Nero\Nero 7\Nero

BackItUp\NBService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA

Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: PunkBuster (PnkBstrA) - Unknown owner - C:\Program

Files\Electronic Arts\Need for Speed ProStreet\PB\PnkBstrA.exe
O23 - Service: Sandra Data Service (SandraDataSrv) - SiSoftware -

C:\SiSoftware Sandra Pro Personnel 2007.SP1\Win32\RpcDataSrv.exe
O23 - Service: Sandra Service (SandraTheSrv) - SiSoftware -

C:\SiSoftware Sandra Pro Personnel 2007.SP1\RpcSandraSrv.exe
O23 - Service: SolidNetWork License Manager - GLOBEtrotter Software

Inc. - C:\Program Files\SolidNetWork License Manager\lmgrd.exe