Cheval de troie

Bonjour,
je suis depuis quelque temps déjà infecté par un cheval de troie que je ne peux supprimer!
ce virus ralenti considérablement mon ordi et dans la mesure ou je suis un gros nul en informatique j'ai vraiment besoin d'aide.
un ami m'a conséillé d'exécuter hijackthis donc voilà le rapport. pouvez vous m'aider SVP?

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:51:18, on 13/07/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
D:\Program Files\Alwil Software\Avast4\ashServ.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\system32\nvsvc32.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\Explorer.EXE
D:\Program Files\Canon\CAL\CALMAIN.exe
D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
D:\WINDOWS\system32\WgaTray.exe
D:\WINDOWS\system32\CTHELPER.EXE
D:\WINDOWS\system32\rundll32.exe
D:\WINDOWS\VM_STI.EXE
D:\Program Files\QuickTime\qttask.exe
D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
D:\WINDOWS\system32\ctfmon.exe
D:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
D:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
D:\Program Files\Philips\SPC 200NC PC Camera\TrayMin200.exe
D:\Program Files\MSN Toolbar Suite\DS\02.05.0001.1119\fr-fr\bin\WindowsSearch.exe
D:\Program Files\MSN Toolbar Suite\DS\02.05.0001.1119\fr-fr\bin\WindowsSearchIndexer.exe
D:\Program Files\Windows Live\Messenger\usnsvc.exe
D:\Program Files\Internet Explorer\iexplore.exe
D:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
D:\WINDOWS\system32\wuauclt.exe
D:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?redirfallthru=http%3a%2f%2fwww.msn.fr%2fimg%2ffr%2ffr-fr%2fmsger%2ftabs%2f_pictos%2fcoca%2fPictoCoke02.png%3f
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = https://www.google.fr/?gws_rd=ssl
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll (file missing)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SDHelper.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} - D:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - d:\program files\google\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - D:\Program Files\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O2 - BHO: Barre d'outils MSN Search Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - D:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll
O3 - Toolbar: Barre d'outils MSN Search - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - D:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll
O3 - Toolbar: Easy-WebPrint - {327C2873-E90D-4c37-AA9D-10AC9BABA46C} - D:\Program Files\Canon\Easy-WebPrint\Toolband.dll
O3 - Toolbar: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - D:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - d:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [NeroFilterCheck] D:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE D:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet /keeploaded /nodetect
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [REGSHAVE] D:\Program Files\REGSHAVE\REGSHAVE.EXE /AUTORUN
O4 - HKLM\..\Run: [BigDogPath] D:\WINDOWS\VM_STI.EXE Philips SPC 200NC PC Camera
O4 - HKLM\..\Run: [QuickTime Task] "D:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [avast!] D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\RunOnce: [SpybotDeletingA140] command /c del "D:\Program Files\Everest Poker\casino.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "D:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [swg] D:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [SpybotSD TeaTimer] D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\RunOnce: [SpybotDeletingD5432] cmd /c del "D:\Program Files\Everest Poker\casino.exe"
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] D:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] D:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] D:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [SetDefaultMidi] MIDIDEF.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] D:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [SetDefaultMidi] MIDIDEF.EXE (User 'Default user')
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = D:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: TrayMin300.exe.lnk = ?
O4 - Global Startup: Windows Desktop Search.lnk = D:\Program Files\MSN Toolbar Suite\DS\02.05.0001.1119\fr-fr\bin\WindowsSearch.exe
O8 - Extra context menu item: &MSN Search - res://D:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll/search.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Easy-WebPrint Ajouter à la Liste à Imprimer - res://D:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_AddToList.html
O8 - Extra context menu item: Easy-WebPrint Impression rapide - res://D:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_HSPrint.html
O8 - Extra context menu item: Easy-WebPrint Imprimer - res://D:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_Print.html
O8 - Extra context menu item: Easy-WebPrint Prévisualiser - res://D:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_Preview.html
O8 - Extra context menu item: Ouvrir dans un nouvel onglet d'arrière-plan - res://D:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/229?5a972c75e3f340f59e75cbd3f487ca7b
O8 - Extra context menu item: Ouvrir dans un nouvel onglet de premier plan - res://D:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/230?5a972c75e3f340f59e75cbd3f487ca7b
O9 - Extra button: (no name) - {B205A35E-1FC4-4CE3-818B-899DBBB3388C} - D:\Program Files\Fichiers communs\Microsoft Shared\Encarta Search Bar\ENCSBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O10 - Unknown file in Winsock LSP: d:\windows\system32\nwprovau.dll
O16 - DPF: Yahoo! Freecell Solitaire - http://presence.games.yahoo.com/yog/y/fs10_x.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {200B3EE9-7242-4EFD-B1E4-D97EE825BA53} (VerifyGMN Class) - http://h20270.www2.hp.com/ediags/gmn/install/hpobjinstaller_gmn.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {867E13F2-7F31-44FB-AC97-CD38E0DC46EF} (HardwareDetection Control) - http://drivers1.free.fr/hardwaredetection.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {AB86CE53-AC9F-449F-9399-D8ABCA09EC09} (Get_ActiveX Control) - https://h17000.www1.hp.com/ewfrf-JAVA/Secure/HPGetDownloadManager.ocx
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Canon Camera Access Library 8 (CCALib8) - Canon Inc. - D:\Program Files\Canon\CAL\CALMAIN.exe
O23 - Service: Google Updater Service (gusvc) - Google - D:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - D:\WINDOWS\system32\nvsvc32.exe