Your computer was infected by unknown trojan

Bonjour,
je sollicite une aide externe à propos d'un trojan que j'ai attrappé malencontreusement.
A chaque ouverture d'une page Web je reçois ce message "your computer was infected by unknown trojan". J'ai fait plusieurs scans avec Ewido d'AVG en mode sans echec et j'ai pu supprimer des trojans qui m'ouvraient des pages Web pornos mais je n'arrive pas à supprimer le trojan qui me lance ce message et m'ouvre un lien publicitaire d'achat d'Antivirus.

Voici le rapport HijackThis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 20:01:00, on 30/03/2008
Platform: Windows Vista (WinNT 6.00.1904)
MSIE: Internet Explorer v7.00 (7.00.6000.16609)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Apoint\Apoint.exe
C:\Program Files\Sony\ISB Utility\ISBMgr.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Alwil Software\Avast4\ashDisp.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Adobe\Acrobat 8.0\Acrobat\acrotray.exe
C:\Windows\System32\mobsync.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Users\Najib MDIDECH\AppData\Local\Temp\AutoDetect.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\Picasa2\PicasaMediaDetector.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Apoint\Apntex.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BtStackServer.exe
C:\Program Files\Internet Explorer\IEUser.exe
C:\Windows\system32\Macromed\Flash\FlashUtil9b.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Skype\Phone\Skype.exe
C:\Program Files\Skype\Plugin Manager\skypePM.exe
C:\Users\Najib MDIDECH\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\FSXBOFRX\HiJackThis[1].exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://accounts.google.com/ServiceLogin?service=mail&passive=true&rm=false&continue=https://mail.google.com/mail/&ss=1&scc=1<mpl=default<mplcache=2&emr=1&osid=1
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.club-vaio.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/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: ::1 localhost
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Media Player Codec - {687A466A-D7CB-4FDF-965C-92462A82D7F0} - C:\Windows\dsaip32b.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: Adobe PDF Conversion Toolbar Helper - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll
O2 - BHO: Browser Address Error Redirector - {CA6319C0-31B7-401E-A518-A07C3DB8F777} - C:\PROGRA~1\GOOGLE~1\BAE.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [Apoint] C:\Program Files\Apoint\Apoint.exe
O4 - HKLM\..\Run: [ISBMgr.exe] "C:\Program Files\Sony\ISB Utility\ISBMgr.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [NvSvc] RUNDLL32.EXE C:\Windows\system32\nvsvc.dll,nvsvcStart
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\Windows\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [StxTrayMenu] C:\Program Files\Seagate\SystemTray\FreeAgentLauncher.exe C:\Program Files\Seagate\SystemTray\StxMenuMgr.exe
O4 - HKLM\..\Run: [Acrobat Assistant 8.0] "C:\Program Files\Adobe\Acrobat 8.0\Acrobat\Acrotray.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [Ceedo AutoDetect] C:\Users\NAJIBM~1\AppData\Local\Temp\AutoDetect.exe /active
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [Picasa Media Detector] C:\Program Files\Picasa2\PicasaMediaDetector.exe
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKCU\..\Run: [AROReminder] C:\Program Files\Advanced Registry Optimizer\ARO.exe -rem
O4 - Global Startup: Adobe Reader Synchronizer.lnk = C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AdobeCollabSync.exe
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: Lancement rapide d'Adobe Acrobat.lnk = ?
O8 - Extra context menu item: Ajouter au fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir la sélection en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la sélection en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir les liens sélectionnés en fichier Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convertir les liens sélectionnés en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer au périphérique &Bluetooth... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O8 - Extra context menu item: Envoyer l'&image au périphérique Bluetooth... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O13 - Gopher Prefix:
O15 - Trusted Zone: *.canalplay.com (HKLM)
O15 - Trusted Zone: *.canalplusactive.com (HKLM)
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Unknown owner - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe (file missing)
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: MSCSPTISRV - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\MSCSPTISRV.exe
O23 - Service: PACSPTISVR - Unknown owner - C:\Program Files\Common Files\Sony Shared\AVLib\PACSPTISVR.exe
O23 - Service: Seagate Sync Service - Seagate Technology LLC - C:\Program Files\Seagate\Sync\SeaSyncServices.exe
O23 - Service: Service CANALPLAY - Canal+ Active - C:\Program Files\Lecteur CANALPLAY\CanalPlayService.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\SPTISRV.exe
O23 - Service: SigmaTel Audio Service (STacSV) - SigmaTel, Inc. - C:\Windows\system32\stacsv.exe
O23 - Service: VAIO Entertainment TV Device Arbitration Service - Sony Corporation - C:\Program Files\Common Files\Sony Shared\VAIO Entertainment Platform\VzCs\VzHardwareResourceManager\VzHardwareResourceManager.exe
O23 - Service: VAIO Event Service - Sony Corporation - C:\Program Files\Sony\VAIO Event Service\VESMgr.exe
O23 - Service: VAIO Media Integrated Server (VAIOMediaPlatform-IntegratedServer-AppServer) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\VMISrv.exe
O23 - Service: VAIO Media Integrated Server (HTTP) (VAIOMediaPlatform-IntegratedServer-HTTP) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\Platform\SV_Httpd.exe
O23 - Service: VAIO Media Integrated Server (UPnP) (VAIOMediaPlatform-IntegratedServer-UPnP) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\Platform\UPnPFramework.exe
O23 - Service: VAIO Media Gateway Server (VAIOMediaPlatform-Mobile-Gateway) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\Platform\VmGateway.exe
O23 - Service: VAIO Media Content Collection (VAIOMediaPlatform-UCLS-AppServer) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\UCLS.exe
O23 - Service: VAIO Media Content Collection (HTTP) (VAIOMediaPlatform-UCLS-HTTP) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\Platform\SV_Httpd.exe
O23 - Service: VAIO Media Content Collection (UPnP) (VAIOMediaPlatform-UCLS-UPnP) - Sony Corporation - C:\Program Files\Sony\VAIO Media Integrated Server\Platform\UPnPFramework.exe
O23 - Service: VAIO Content Metadata Intelligent Analyzing Manager (VcmIAlzMgr) - Sony Corporation - C:\Program Files\Sony\VCM Intelligent Analyzing Manager\VcmIAlzMgr.exe
O23 - Service: VAIO Content Metadata XML Interface (VcmXmlIfHelper) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\VcmXml\VcmXmlIfHelper.exe
O23 - Service: VAIO Entertainment UPnP Client Adapter (Vcsw) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\VAIO Entertainment Platform\VCSW\VCSW.exe
O23 - Service: VAIO Entertainment Database Service (VzCdbSvc) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\VAIO Entertainment Platform\VzCdb\VzCdbSvc.exe
O23 - Service: VAIO Entertainment File Import Service (VzFw) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\VAIO Entertainment Platform\VzCdb\VzFw.exe
O23 - Service: XAudioService - Conexant Systems, Inc. - C:\Windows\system32\DRIVERS\xaudio.exe