Problème avec un cheval de Troie

Bonjour,de retour de vacances j'ai eu le plaisir de constater que mon pti frère avait fait n'importe quoi avec mon ordi et du coup j'ai un cheval de Troie. J'ai lancé antivir,Malwayrebytes,nccleaner et cccleaner plusieurs fois mais rien n'y fait. Aidez moi par pitié! Voici mon dernier rapport hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:30:16, on 21/09/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16876)
Boot mode: Normal

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\csrss.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:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Tall Emu\Online Armor\oasrv.exe
D:\WINDOWS\system32\spoolsv.exe
D:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
D:\WINDOWS\Explorer.EXE
D:\WINDOWS\system32\nvsvc32.exe
D:\Program Files\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\TomTom HOME 2\TomTomHOMEService.exe
D:\WINDOWS\System32\alg.exe
D:\WINDOWS\system32\wscntfy.exe
D:\WINDOWS\system32\CTHELPER.EXE
D:\WINDOWS\VM_STI.EXE
D:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
D:\WINDOWS\system32\rundll32.exe
D:\Program Files\Windows Live\Messenger\msnmsgr.exe
D:\Program Files\TomTom HOME 2\TomTomHOMERunner.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:\WINDOWS\system32\WgaTray.exe
D:\WINDOWS\system32\wuauclt.exe
D:\Program Files\Malwarebytes' Anti-Malware\mbam.exe
D:\Program Files\Avira\AntiVir PersonalEdition Classic\avscan.exe
D:\WINDOWS\winhlp32.exe
D:\Documents and Settings\Pierre\Application Data\eoRezo\SoftwareUpdate\SoftwareUpdateHP.exe
D:\Program Files\EoRezo\EoEngine.exe
D:\Documents and Settings\Pierre\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
D:\Documents and Settings\Pierre\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
D:\Documents and Settings\Pierre\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
D:\Documents and Settings\Pierre\Mes documents\Downloads\HiJackThis.exe
D:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://y.lo.st
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
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/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 127.0.0.1:9666
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} - D:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - D:\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} - 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
O2 - BHO: EoBHO - {C7B76B90-3455-4AE6-A752-EAC4D19689E5} - D:\Program Files\EoRezo\EoAdv\EoRezoBHO.dll
O2 - BHO: FDMIECookiesBHO Class - {CC59E0F9-7E43-44FA-9FAA-8377850BF205} - (no file)
O2 - BHO: Windows Live Toolbar Helper - {E15A8DC0-8516-42A1-81EA-DC94EC1ACF10} - D:\Program Files\Windows Live\Toolbar\wltcore.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: &Windows Live Toolbar - {21FA44EF-376D-4D53-9B0F-8A89D3229068} - D:\Program Files\Windows Live\Toolbar\wltcore.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: [avgnt] "D:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "D:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [QuickTime Task] "D:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "D:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [AppleSyncNotifier] D:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleSyncNotifier.exe
O4 - HKLM\..\Run: [USB Storage Toolbox] D:\Program Files\USB Disk Win98 Driver\Res.EXE
O4 - HKLM\..\Run: [Malwarebytes Anti-Malware (reboot)] "D:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKLM\..\Run: [EoEngine] "D:\Program Files\EoRezo\EoEngine.exe"
O4 - HKLM\..\Run: [SoftwareHelper] D:\Documents and Settings\Pierre\Application Data\eoRezo\SoftwareUpdate\SoftwareUpdateHP.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: [TomTomHOME.exe] "D:\Program Files\TomTom HOME 2\TomTomHOMERunner.exe"
O4 - HKCU\..\Run: [Google Update] "D:\Documents and Settings\Pierre\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
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: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office10\OSA.EXE
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: Tout télécharger avec Free Download Manager - file://D:\Program Files\Free Download Manager\dlall.htm
O8 - Extra context menu item: Télécharger avec Free Download Manager - file://D:\Program Files\Free Download Manager\dllink.htm
O8 - Extra context menu item: Télécharger la sélection avec Free Download Manager - file://D:\Program Files\Free Download Manager\dlselected.htm
O8 - Extra context menu item: Télécharger la vidéo avec Free Download Manager - file://D:\Program Files\Free Download Manager\dlfvideo.htm
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - D:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - D:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
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) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - D:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - D:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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} - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {200B3EE9-7242-4EFD-B1E4-D97EE825BA53} - http://h20270.www2.hp.com/ediags/gmn/install/hpobjinstaller_gmn.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {5D637FAD-E202-48D1-8F18-5B9C459BD1E3} (Image Uploader Control) - http://express.foto.com/ImageUploader5.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: {88764F69-3831-4EC1-B40B-FF21D8381345} (AdVerifierADPCtrl Class) - https://static.impots.gouv.fr/tdir/static/adpform/AdSignerADP-2.0.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {AB86CE53-AC9F-449F-9399-D8ABCA09EC09} - https://h17000.www1.hp.com/ewfrf-JAVA/Secure/HPGetDownloadManager.ocx
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O23 - Service: Avira AntiVir Personal – Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - D:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal – Free Antivirus Guard (AntiVirService) - Avira GmbH - D:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple Inc. - D:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - D:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Google Updater Service (gusvc) - Google - D:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - D:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - D:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Online Armor (SvcOnlineArmor) - Tall Emu - D:\Program Files\Tall Emu\Online Armor\oasrv.exe
O23 - Service: TomTomHOMEService - TomTom - D:\Program Files\TomTom HOME 2\TomTomHOMEService.exe