Mon pc est vraiment lent et bruyant

Bonjour,
comme indiqué dans le titre mon pc est vraiment lent et bruyant.
J'aimerais donc recevoir une aide de votre part pour pouvoir résoudre ce problème.

voila le rapport hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13:08:54, on 28/09/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16705)
Boot mode: Normal

Running processes:
H:\WINDOWS\System32\smss.exe
H:\WINDOWS\system32\csrss.exe
H:\WINDOWS\system32\winlogon.exe
H:\WINDOWS\system32\services.exe
H:\WINDOWS\system32\lsass.exe
H:\WINDOWS\system32\Ati2evxx.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\System32\svchost.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\system32\svchost.exe
H:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
H:\Program Files\Alwil Software\Avast4\ashServ.exe
H:\WINDOWS\system32\spoolsv.exe
H:\Program Files\Bonjour\mDNSResponder.exe
H:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
H:\Program Files\Spyware Doctor\pctsAuxs.exe
H:\Program Files\Spyware Doctor\pctsSvc.exe
H:\WINDOWS\system32\svchost.exe
H:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
H:\Program Files\Alwil Software\Avast4\ashWebSv.exe
H:\WINDOWS\System32\alg.exe
H:\WINDOWS\system32\Ati2evxx.exe
H:\WINDOWS\Explorer.EXE
H:\WINDOWS\SOUNDMAN.EXE
H:\WINDOWS\system32\LVCOMSX.EXE
H:\Program Files\Logitech\Video\LogiTray.exe
H:\WINDOWS\AGRSMMSG.exe
H:\Program Files\HP\HP Software Update\HPWuSchd2.exe
H:\Program Files\Java\jre1.6.0_06\bin\jusched.exe
H:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
H:\Program Files\Logitech\Video\FxSvr2.exe
H:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
H:\Program Files\Spyware Doctor\pctsTray.exe
H:\WINDOWS\system32\ctfmon.exe
H:\Program Files\Windows Live\Messenger\msnmsgr.exe
H:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE
H:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
H:\Program Files\Google\Google Updater\GoogleUpdater.exe
H:\Documents and Settings\Pc\Application Data\Microsoft\Live Search\Notification-LiveSearch.exe
H:\Documents and Settings\Pc\Application Data\Microsoft\Live Search\Mise-a-jour-LiveSearch.exe
H:\Program Files\HP\Digital Imaging\bin\hpqgalry.exe
H:\Program Files\Internet Explorer\iexplore.exe
H:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
H:\Program Files\Windows Live\Messenger\usnsvc.exe
H:\Program Files\Windows Live Toolbar\msn_sl.exe
H:\Program Files\Trend Micro\HijackThis\HJT.exe
H:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://fr.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?pc=mssh&form=msshhp&ocid=onepro&homepage=http%3a%2f%2ffr.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Windows Internet Explorer fourni par Yahoo! France
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - H:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: (no name) - SOFTWARE - (no file)
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - H:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - H:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - H:\Program Files\Java\jre1.6.0_06\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} - H:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - h:\program files\google\googletoolbar1.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - H:\Program Files\Google\GoogleToolbarNotifier\2.1.1119.1736\swg.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - H:\Program Files\Windows Live Toolbar\msntb.dll
O2 - BHO: PDFCreator Toolbar Helper - {C451C08A-EC37-45DF-AAAD-18B51AB5E837} - H:\Program Files\PDFCreator Toolbar\v3.3.0.1\PDFCreator_Toolbar.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - H:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - H:\Program Files\Windows Live Toolbar\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - h:\program files\google\googletoolbar1.dll
O3 - Toolbar: PDFCreator Toolbar - {31CF9EBE-5755-4A1D-AC25-2834D952D9B4} - H:\Program Files\PDFCreator Toolbar\v3.3.0.1\PDFCreator_Toolbar.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [LVCOMSX] H:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] H:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] H:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [HP Software Update] H:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "H:\Program Files\Java\jre1.6.0_06\bin\jusched.exe"
O4 - HKLM\..\Run: [QuickTime Task] "H:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [avast!] H:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Google Desktop Search] "H:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe" /startup
O4 - HKLM\..\Run: [TkBellExe] "H:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "H:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [ISTray] "H:\Program Files\Spyware Doctor\pctsTray.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "H:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [MsnMsgr] "H:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [H/PC Connection Agent] "H:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: OneNote 2007 - Capture d'écran et lancement.lnk = H:\Program Files\Microsoft Office\Office12\ONENOTEM.EXE
O4 - Startup: Outil de notification Live Search.lnk = H:\Documents and Settings\Pc\Application Data\Microsoft\Live Search\Notification-LiveSearch.exe
O4 - Global Startup: Démarrage rapide du logiciel HP Image Zone.lnk = H:\Program Files\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = H:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Logiciel Kodak EasyShare.lnk = H:\Program Files\Kodak\Kodak EasyShare software\bin\EasyShare.exe
O4 - Global Startup: Outil de mise à jour Google.lnk = H:\Program Files\Google\Google Updater\GoogleUpdater.exe
O8 - Extra context menu item: &Windows Live Search - res://H:\Program Files\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: Add to Windows &Live Favorites - https://onedrive.live.com/?id=favorites
O8 - Extra context menu item: Convertir les liens sélectionnés en fichier Adobe PDF - res://H:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://H:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.6.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.6.0_06\bin\ssv.dll
O9 - Extra button: Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - H:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - H:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Créer un Favori de l'appareil mobile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - H:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - H:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - H:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: Bonjour - {7F9DB11C-E358-4ca6-A83D-ACC663939424} - H:\Program Files\Bonjour\ExplorerPlugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - H:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - H:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - H:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {20A60F0D-9AFA-4515-A0FD-83BD84642501} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab56986.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w2/resources/MSNPUpld.cab
O16 - DPF: {5C051655-FCD5-4969-9182-770EA5AA5565} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab56986.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/ES-ES/a-UNO1/GAME_UNO1.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (MSN Games - Installer) - http://messenger.zone.msn.com/binary/ZIntro.cab56649.cab
O16 - DPF: {BD393C14-72AD-4790-A095-76522973D6B8} (CBreakshotControl Class) - http://messenger.zone.msn.com/binary/Bankshot.cab31267.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {CE69F98F-2AF3-4306-BAC6-A79070EDA1B4} (Zylom Loader Object) - http://eu.download.games.yahoo.com/zylom/activex/zylomloader.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {E6187999-9FEC-46A1-A20F-F4CA977D5643} (ZoneChess Object) - http://messenger.zone.msn.com/binary/Chess.cab31267.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab56986.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O16 - DPF: {FFBB3F3B-0A5A-4106-BE53-DFE1E2340CB1} (Contrôleur de DownloadManager) - http://dlm.tools.akamai.com/dlmanager/versions/activex/dlm-activex-2.2.1.6.cab
O18 - Filter hijack: text/html - {C6F62B7A-5450-4A2F-8687-6CEEC3AEB055} - H:\WINDOWS\system32\controlkids2.dll
O20 - AppInit_DLLs: H:\PROGRA~1\Google\GOOGLE~2\GOEC62~1.DLL
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - H:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - H:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - H:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Computer, Inc. - H:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Google Desktop Manager 5.7.802.22438 (GoogleDesktopManager-022208-143751) - Google - H:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
O23 - Service: Google Updater Service (gusvc) - Google - H:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - H:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Pml Driver HPZ12 - HP - H:\WINDOWS\system32\HPZipm12.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - H:\Program Files\Spyware Doctor\pctsAuxs.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - H:\Program Files\Spyware Doctor\pctsSvc.exe
O23 - Service: ServiceLayer - Nokia. - H:\Program Files\PC Connectivity Solution\ServiceLayer.exe