Lenteur du pc

Bonjour, mon pc est d'une lenteur incroyable depuis quelques mois. Je viens de faire un log HijackThis pour savoir d'où viennent tout ces problèmes, pourriez - vous m' éclairez sur ce log svp ?
C:WINDOWSSystem32smss.exe
C:WINDOWSsystem32winlogon.exe
C:WINDOWSsystem32services.exe
C:WINDOWSsystem32lsass.exe
C:WINDOWSsystem32svchost.exe
C:WINDOWSSystem32svchost.exe
C:WINDOWSsystem32ZONELABSvsmon.exe
C:WINDOWSExplorer.EXE
C:WINDOWSsystem32LEXBCES.EXE
C:WINDOWSsystem32spoolsv.exe
C:WINDOWSsystem32LEXPPS.EXE
C:Program FilesZone LabsZoneAlarmzlclient.exe
C:WINDOWSsystem32nvsvc32.exe
C:WINDOWSsystem32ctfmon.exe
C:Documents and SettingsEricBureaurambxpfr.exe
C:WINDOWSsystem32pctspk.exe
C:WINDOWSSystem32svchost.exe
C:WINDOWSSystem32MsPMSPSv.exe
C:WINDOWSsystem32ZoneLabsisafe.exe
C:PROGRA~1ZONELA~1ZONEAL~1MAILFR~1mantispm.exe
C:Program FilesWindows DefenderMsMpEng.exe
C:Program FilesSpyware TerminatorSpywareTerminator.exe
C:Program FilesSpyware TerminatorSpywareTerminatorShield.exe
C:Program FilesSpyware Terminatorsp_rsser.exe
C:Program FilesWinClamAVShieldsp_clamsrv.exe
C:Program FilesFBM SoftwareZeroSpywareZeroSpyware.exe
C:Documents and SettingsEricBureauhijackthis_hijackthis_1.99.1_anglais_17891.exe
C:Program FilesInternet Exploreriexplore.exe
C:WINDOWSsystem32RunDll32.exe

R0 - HKCUSoftwareMicrosoftInternet ExplorerMain,Start Page = http://www.jeuxvideo.com/etajvbis...
R1 - HKLMSoftwareMicrosoftInternet ExplorerMain,Default_Page_URL = http://go.microsoft.com/fwlink...
R1 - HKLMSoftwareMicrosoftInternet ExplorerMain,Default_Search_URL = http://go.microsoft.com/fwlink...
R1 - HKLMSoftwareMicrosoftInternet ExplorerMain,Search Page = http://go.microsoft.com/fwlink...
R0 - HKLMSoftwareMicrosoftInternet ExplorerMain,Start Page = http://go.microsoft.com/fwlink/?LinkId=55245&clcid={SUB_CLCID}
R0 - HKCUSoftwareMicrosoftInternet ExplorerMain,Local Page =
R0 - HKCUSoftwareMicrosoftInternet ExplorerToolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - (no file)
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:Program FilesYahoo!CompanionInstallscpnyt.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:Program FilesAdobeAcrobat 7.0ActiveXAcroIEHelper.dll
O2 - BHO: SWEETIE Class - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - (no file)
O2 - BHO: ALTAVISTA - {4E7BD74F-2B8D-469E-92EA-EC65A294AE31} - C:WINDOWSDOWNLO~1CONFLICT.1ALTAVI~1.DLL
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:Program FilesSpybot - Search & DestroySDHelper.dll
O2 - BHO: EoBho Class - {64F56FC1-1272-44CD-BA6E-39723696E350} - (no file)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:Program FilesJavajre1.5.0_06binssv.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:Program FilesFichiers communsMicrosoft SharedWindows LiveWindowsLiveLogin.dll
O3 - Toolbar: ALTAVISTA - {4E7BD74F-2B8D-469E-92EA-EC65A294AE31} - C:WINDOWSDOWNLO~1CONFLICT.1ALTAVI~1.DLL
O3 - Toolbar: (no name) - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: (no name) - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - (no file)
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:Program FilesYahoo!CompanionInstallscpnyt.dll
O4 - HKLM..Run: [Zone Labs Client] "C:Program FilesZone LabsZoneAlarmzlclient.exe"
O4 - HKLM..Run: [Windows Defender] "C:Program FilesWindows DefenderMSASCui.exe" -hide
O4 - HKLM..Run: [SpywareTerminator] "C:Program FilesSpyware TerminatorSpywareTerminatorShield.exe"
O4 - HKLM..Run: [ZSScheduler] "C:Program FilesFBM SoftwareZeroSpywareZSLoader.exe" -STARTUP
O4 - HKLM..RunOnce: [ZeroSpyware] "C:Program FilesFBM SoftwareZeroSpywareZSLoader.exe" -STARTUP
O4 - HKCU..Run: [msnmsgr] "C:Program FilesMSN Messengermsnmsgr.exe" /background
O4 - HKCU..Run: [ctfmon.exe] C:WINDOWSsystem32ctfmon.exe
O4 - HKCU..Run: [RamBoostXp] C:Documents and SettingsEricBureaurambxpfr.exe
O4 - Global Startup: Microsoft Office.lnk = C:Program FilesMicrosoft OfficeOffice10OSA.EXE
O8 - Extra context menu item: &Download with &DAP - C:Program FilesDAPdapextie.htm
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://c:program filesgoogleGoogleToolbar2.dll/cmwordtrans.html
O8 - Extra context menu item: AltaVista Search - file://C:Program FilesALTAVISTA ToolbarCacheSelectedContextSearch.htm
O8 - Extra context menu item: Download &all with DAP - C:Program FilesDAPdapextie2.htm
O8 - Extra context menu item: Pages liées - res://c:program filesgoogleGoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:program filesgoogleGoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://c:program filesgoogleGoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Translate - file://C:Program FilesALTAVISTA ToolbarCacheSelectedContextTranslation.htm
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://c:program filesgoogleGoogleToolbar2.dll/cmcache.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:Program FilesJavajre1.5.0_06binssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:Program FilesJavajre1.5.0_06binssv.dll
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:WINDOWSSystem32shdocvw.dll
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:WINDOWSSystem32shdocvw.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%Network Diagnosticxpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%Network Diagnosticxpnetdiag.exe (file missing)
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:Program FilesYahoo!MessengerYahooMessenger.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:Program FilesYahoo!MessengerYahooMessenger.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:Program FilesMessengermsmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:Program FilesMessengermsmsgs.exe
O9 - Extra button: (no name) - SolidConverterPDF - (no file) (HKCU)
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn...
O16 - DPF: {09CC593B-E8A9-4491-927D-A3E33534DDD4} (InstallerObj Class) - http://m6video.m6.fr/1click...
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink...
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn...
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:Program FilesYahoo!Commonyinsthelper.dll
O16 - DPF: {4E7BD74F-2B8D-469E-92EA-EC65A294AE31} (ALTAVISTA) - http://toolbar.altavista.com...
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com...
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn...
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:PROGRA~1MSNMES~1MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:PROGRA~1MSNMES~1MSGRAP~1.DLL
O20 - Winlogon Notify: klogon - C:WINDOWSsystem32klogon.dll
O20 - Winlogon Notify: WgaLogon - C:WINDOWSSYSTEM32WgaLogon.dll
O20 - Winlogon Notify: WRNotifier - WRLogonNTF.dll (file missing)
O20 - Winlogon Notify: zsnotify - C:WINDOWSSYSTEM32zsnotify.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:WINDOWSsystem32WPDShServiceObj.dll
O23 - Service: CA ISafe (CAISafe) - Computer Associates International, Inc. - C:WINDOWSsystem32ZoneLabsisafe.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:Program FilesFichiers communsInstallShieldDriver1050Intel 32IDriverT.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:WINDOWSsystem32LEXBCES.EXE
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:WINDOWSsystem32nvsvc32.exe
O23 - Service: PCTEL Speaker Phone (Pctspk) - PCtel, Inc. - C:WINDOWSsystem32pctspk.exe
O23 - Service: Spyware Terminator Clam Service (sp_clamsrv) - Crawler.com - C:Program FilesWinClamAVShieldsp_clamsrv.exe
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:Program FilesSpyware Terminatorsp_rsser.exe
O23 - Service: TuneUp WinStyler Theme Service (TUWinStylerThemeSvc) - TuneUp Software GmbH - C:Program FilesTuneUp Utilities 2006WinStylerThemeSvc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:WINDOWSsystem32ZONELABSvsmon.exe
En ésperant un réponse de votre part, merci d'avance