Ordinateur très lent

Bonjour à tous, depuis 2 - 3 jours l'ordinateur est devenu plus lent qu'à l'habitude, les videos YouTube coupe, windows media player fait sacader les chansons, les fenêtres prennent longtemps à fermer / ouvrir, le boot au démarrage windows est aussi lent.

J'utilise : Windows XP Familial
512MB de Ram
1.34 Ggz
64MB de graphique

Oui c'est vieux, mais avant elle allait a une vitesse utilisable, et les videos, boot etc allait beaucoup plus vite et mieux.

Merci !  

EDIT: Voilà un rapport HijackThis

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:50:29, on 2009-10-09
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16876)
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Lavasoft\Ad-Aware\aawservice.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\WINDOWS\system32\cisvc.exe
C:\WINDOWS\system32\CTsvcCDA.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\WINDOWS\system32\drivers\KodakCCS.exe
C:\Program Files\Fichiers communs\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
E:\MapleStory\npkcmsvc.exe
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Fichiers communs\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\QuickTime\QTTask.exe
C:\WINDOWS\system32\PnkBstrA.exe
E:\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\PnkBstrB.exe
C:\WINDOWS\System32\ScsiAccess.EXE
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\TUProgSt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\System32\svchost.exe
C:\Documents and Settings\Real\Local Settings\Application Data\Google\Update\1.2.183.7\GoogleCrashHandler.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\wuauclt.exe
E:\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.com/0SEENUS/SAOS01?FORM=TOOLBR
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://g.msn.com/0SEENUS/SAOS01?FORM=TOOLBR
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.sympatico.ca/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://g.msn.com/0SEENUS/SAOS01?FORM=TOOLBR
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost;*.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.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: Click-to-Call BHO - {5C255C8A-E604-49b4-9D64-90988571CECB} - C:\Program Files\Windows Live\Messenger\wlchtc.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.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\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.2.4204.1700\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: Google Gears Helper - {E0FEFE40-FBF9-42AE-BA58-794CA7E3FB53} - C:\Program Files\Google\Google Gears\Internet Explorer\0.5.32.0\gears.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [CmPCIaudio] RunDll32 CMICNFG3.CPL,CMICtrlWnd
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime -Delay
O4 - HKLM\..\Run: [Symantec PIF AlertEng] "C:\Program Files\Fichiers communs\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe" /a /m "C:\Program Files\Fichiers communs\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\AlertEng.dll"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [BrMfcWnd] C:\Program Files\Brother\Brmfcmon\BrMfcWnd.exe /AUTORUN
O4 - HKLM\..\Run: [SetDefPrt] E:\Brother\Brmfl06a\BrStDvPt.exe
O4 - HKLM\..\Run: [ControlCenter3] C:\Program Files\Brother\ControlCenter3\brctrcen.exe /autorun
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "E:\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb07.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Real\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\RunOnce: [Shockwave Updater] C:\WINDOWS\system32\Adobe\Shockwave 11\SwHelper_1150600.exe -Update -1150600 -"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)" -"http://www.miniclip.com/games/jet-ski-racing/en/"
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: Convertir les liens sélectionnés en fichier Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Download with Xilisoft Download YouTube Video - C:\Program Files\Xilisoft\Download YouTube Video\upod_link.HTM
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://E:\MICROS~1\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {09C04DA7-5B76-4EBC-BBEE-B25EAC5965F5} - C:\Program Files\Google\Google Gears\Internet Explorer\0.5.32.0\gears.dll
O9 - Extra 'Tools' menuitem: Paramètres de Google &Gears - {09C04DA7-5B76-4EBC-BBEE-B25EAC5965F5} - C:\Program Files\Google\Google Gears\Internet Explorer\0.5.32.0\gears.dll
O9 - Extra button: (no name) - {5067A26B-1337-4436-8AFE-EE169C2DA79F} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra 'Tools' menuitem: Skype add-on for Internet Explorer - {5067A26B-1337-4436-8AFE-EE169C2DA79F} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\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
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267....
O16 - DPF: {05D44720-58E3-49E6-BDF6-D00330E511D3} (MSN Games – Matchmaking) - http://zone.msn.com/binFrameWork/v10/StagingUI.cab55579...
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {2250C29C-C5E9-4F55-BE4E-01E45A40FCF1} (CMediaMix Object) - http://musicmix.messenger.msn.com/Medialogic.CAB
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab301...
O16 - DPF: {2931566C-B8A6-46C5-BF4D-E6AB9251E953} (Nexon Package Manager Control) - http://s.nx.com/activex/public_new/nxpm.cab
O16 - DPF: {3BB54395-5982-4788-8AF4-B5388FFDD0D8} (MSN Games – Buddy Invite) - http://zone.msn.com/BinFrameWork/v10/ZBuddy.cab55579.ca...
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by22fd.bay22.hotmail.msn.com/resources/MsnPUpld....
O16 - DPF: {5736C456-EA94-4AAC-BB08-917ABDD035B3} (MSN Games – Game Chat) - http://zone.msn.com/binframework/v10/ZPAChat.cab55579.c...
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-CA/a-UNO1/GAME_UNO1.ca...
O16 - DPF: {5F5F9FB8-878E-4455-95E0-F64B2314288A} (ijjiPlugin2 Class) - http://gamedownload.ijjimax.com/gamedownload/dist/hgsta...
O16 - DPF: {7B41B7AC-3496-4C13-A70F-DE6B60A6A8A8} (MGAME manager Class) - http://legendofares.netgame.com/download/mgusamanagerv1...
O16 - DPF: {8100D56A-5661-482C-BEE8-AFECE305D968} (Facebook Photo Uploader 5 Control) - http://upload.facebook.com/controls/2009.07.28_v5.5.8.1...
O16 - DPF: {8AB8BEAA-001B-4F5E-AB26-46D5611B10DE} (CM9ActiveX Object) - http://httppang.playolive.com/joyonpang/full/launcher/M...
O16 - DPF: {8B1BC605-C593-4865-8F5B-05517F0CD0BB} (MSSecurityAdvisorCD Class) - file://D:\Content\include\msSecUcd.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClie...
O16 - DPF: {9122D757-5A4F-4768-82C5-B4171D8556A7} (PhotoPickConvert Class) - http://appdirectory.messenger.msn.com/AppDirectory/P4Ap...
O16 - DPF: {95B5D20C-BD31-4489-8ABF-F8C8BE748463} (MSN Games – Hearts) - http://zone.msn.com/bingame/zpagames/zpa_hrtz.cab99160....
O16 - DPF: {99CAAA27-FA0C-4FA4-B88A-4AB1CC7A17FE} (MGLaunch_USAv1001 Class) - http://ares.netgame.com/download/mglaunch_USAv1002.cab
O16 - DPF: {A4110378-789B-455F-AE86-3A1BFC402853} (ZPA_SHVL Object) - http://zone.msn.com/bingame/zpagames/zpa_shvl.cab55579....
O16 - DPF: {AA07EBD2-EBDD-4BD6-9F8F-114BD513492C} (NeffyLauncherCtl Class) - http://dist.globalgamecdn.com/dist/neffy/NeffyLauncher....
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDown...
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (MSN Games - Installer) - http://cdn2.zone.msn.com/binFramework/v10/ZPAFramework....
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPACl...
O16 - DPF: {CD995117-98E5-4169-9920-6C12D4C0B548} - http://gamedownload.ijjimax.com/gamedownload/dist/hgsta...
O16 - DPF: {D4323BF2-006A-4440-A2F5-27E3E7AB25F8} (Virtools WebPlayer Class) - http://a532.g.akamai.net/f/532/6712/5m/virtools.downloa...
O16 - DPF: {DA2AA6CF-5C7A-4B71-BC3B-C771BB369937} (MSN Games – Game Communicator) - http://zone.msn.com/binframework/v10/StProxy.cab55579.c...
O16 - DPF: {DD583921-A9E9-4FBF-9266-8DC2AB5EA0AF} - http://gamedownload.ijjimax.com/gamedownload/dist/hgsta...
O16 - DPF: {E5D419D6-A846-4514-9FAD-97E826C84822} (HeartbeatCtl Class) - http://fdl.msn.com/zone/datafiles/heartbeat.cab
O16 - DPF: {FD0B6769-6490-4A91-AA0A-B5AE0DC75AC9} (Performance Viewer Activex Control) - https://secure.logmein.com/activex/ractrl.cab
O16 - DPF: {FF3C5A9F-5A99-4930-80E8-4709194C2AD3} (ZPA_Backgammon Object) - http://zone.msn.com/bingame/zpagames/ZPA_Backgammon.cab...
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O23 - Service: Lavasoft Ad-Aware Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\aawservice.exe
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe (file missing)
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.exe
O23 - Service: Google Update Service (gupdate1c9f5e055f9e57c) (gupdate1c9f5e055f9e57c) - 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: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Kodak Camera Connection Software (KodakCCS) - Eastman Kodak Company - C:\WINDOWS\system32\drivers\KodakCCS.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~2.EXE
O23 - Service: LiveUpdate Notice Service Ex (LiveUpdate Notice Ex) - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe (file missing)
O23 - Service: LiveUpdate Notice Service - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
O23 - Service: NMIndexingService - Unknown owner - C:\Program Files\Fichiers communs\Ahead\Lib\NMIndexingService.exe (file missing)
O23 - Service: nProtect GameGuard Service (npggsvc) - Unknown owner - C:\WINDOWS\system32\GameMon.des.exe (file missing)
O23 - Service: npkcmsvc - INCA Internet Co., Ltd. - E:\MapleStory\npkcmsvc.exe
O23 - Service: Planificateur LiveUpdate automatique - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: PnkBstrB - Unknown owner - C:\WINDOWS\system32\PnkBstrB.exe
O23 - Service: ScsiAccess - Unknown owner - C:\WINDOWS\System32\ScsiAccess.EXE
O23 - Service: TuneUp Drive Defrag Service (TuneUp.Defrag) - TuneUp Software - C:\WINDOWS\System32\TuneUpDefragService.exe
O23 - Service: TuneUp Program Statistics Service (TuneUp.ProgramStatisticsSvc) - TuneUp Software - C:\WINDOWS\System32\TUProgSt.exe

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