Ordinateur lent/probleme explorer.exe

Bonjour,

j'ai depuis quelques temps un petit problèmes avec mon ordinateur. Je le trouve relativement lent et il bug assez souvent.
Depuis hier, explorer bug complètement également, impossible de le relancer sauf si on redémarre l'ordinateur.

J'ai réalisé un rapport Hijackthis mais je ne sais pas les lire, donc je vous le poste :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:46:35, on 21/08/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\BitDefender\BitDefender 2011\vsserv.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\LogMeIn\x86\LogMeInSystray.exe
C:\Program Files\Caere\OmniPagePro90\opware32.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\BitDefender\BitDefender 2011\bdagent.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\LogMeIn\x86\LMIGuardian.exe
C:\WINDOWS\system32\ntvdm.exe
C:\WINDOWS\system32\PnkBstrA.exe
C:\WINDOWS\system32\PnkBstrB.exe
C:\Program Files\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
C:\Program Files\BitDefender\BitDefender 2011\pchooklaunch32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe
C:\Program Files\BitDefender\BitDefender 2011\updatesrv.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesApp32.exe
C:\Program Files\Mozilla Thunderbird\thunderbird.exe
F:\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = "C:\Program Files\Outlook Express\msimn.exe"
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SEPsearchhelperie.dll
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\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.5.5126.1836\swg.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Windows Live Toolbar Helper - {E15A8DC0-8516-42A1-81EA-DC94EC1ACF10} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: &Windows Live Toolbar - {21FA44EF-376D-4D53-9B0F-8A89D3229068} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O3 - Toolbar: BitDefender Toolbar - {381FFDE8-2394-4F90-B10D-FC6124A40F8C} - C:\Program Files\BitDefender\BitDefender 2011\IEToolbar.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [LogMeIn GUI] "C:\Program Files\LogMeIn\x86\LogMeInSystray.exe"
O4 - HKLM\..\Run: [OmniPage] C:\Program Files\Caere\OmniPagePro90\opware32.exe
O4 - HKLM\..\Run: [CanonSolutionMenu] C:\Program Files\Canon\SolutionMenu\CNSLMAIN.exe /logon
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [BitDefender Antiphishing Helper] "C:\Program Files\BitDefender\BitDefender 2011\ieshow.exe"
O4 - HKLM\..\Run: [BDAgent] "C:\Program Files\BitDefender\BitDefender 2011\bdagent.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [swg] "C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe"
O4 - HKCU\..\RunOnce: [WiseStubReboot] MSIEXEC /quiet SKIP_PPU_DRIVER_INSTALL=1 /I "C:\Program Files\Fichiers communs\Wise Installation Wizard\WISDD1865F0AD7340FBB23E1822E02396FF_9_09_0203.MSI" TRANSFORMS="C:\Program Files\Fichiers communs\Wise Installation Wizard\WISDD1865F0AD7340FBB23E1822E02396FF_9_09_0203.MST" WISE_SETUP_EXE_PATH="d:\driver\common\win2k_xp\PhysX_9.09.0203_SystemSoftware.exe"
O4 - HKLM\..\Policies\Explorer\Run: [Policies] C:\directory\CyberGate\install\wc3.exe
O4 - HKCU\..\Policies\Explorer\Run: [Policies] C:\directory\CyberGate\install\wc3.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-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\WINDOWS\system32\GPhotos.scr/200
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\OFFICE~1\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Google Sidewiki... - res://C:\Program Files\Google\Google Toolbar\Component\GoogleToolbarDynamic_mui_en_89D8574934B26AC4.dll/cmsidewiki.html
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: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\OFFICE~1\OFFICE11\REFIEBAR.DLL
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: {867E13F2-7F31-44FB-AC97-CD38E0DC46EF} ("Ma-Config.com control) - http://fichiers.touslesdrivers.com/maconfig/MaConfig_4_2_1_1.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{B5D81965-2995-4FA6-9B36-15DE1CF03B90}: NameServer = 208.67.222.222,208.67.220.220
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Service Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Ma-Config Service (maconfservice) - CybelSoft - C:\Program Files\ma-config.com\maconfservice.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: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: PnkBstrB - Unknown owner - C:\WINDOWS\system32\PnkBstrB.exe
O23 - Service: TuneUp Drive Defrag Service (TuneUp.Defrag) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpDefragService.exe
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe
O23 - Service: BitDefender Update Server v2 (Update Server) - BitDefender - C:\Program Files\Fichiers communs\BitDefender\BitDefender Arrakis Server\bin\arrakis3.exe
O23 - Service: BitDefender Desktop Update Service (Updatesrv) - BitDefender S.R.L. - C:\Program Files\BitDefender\BitDefender 2011\updatesrv.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - BitDefender S.R.L. - C:\Program Files\BitDefender\BitDefender 2011\vsserv.exe
O23 - Service: Gestionnaire de mise à jour Winsudate (WinSvc) - Unknown owner - C:\Program Files\Winsudate\gibsvc.exe (file missing)