Problème de virus avec firefox

Bonjour,
j'ai un petit soucis avec Firefox! quand je fais une recherche sur google et que je selectionne le site, celui-çi m'envoie sur un site porno en me faisant passer par un site dont le nom est 64.28.189.53... j'ai fait une analyse en ligne et il m'a trouvé quelque virus que j'ai supprimé. Seulement le problème persiste! je comprend pas trop parce que quand j'utilise IE7 je n'ai pas ce problème!à tout hasard je vous poste un log d'hijackthis. pouvez vous m'aidez s'il vous plait??
Merci beaucoup!!

Logfile of HijackThis v1.99.1
Scan saved at 19:33:21, on 29/12/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

Running processes:
C:\WINDOWS.0\System32\smss.exe
C:\WINDOWS.0\system32\csrss.exe
C:\WINDOWS.0\system32\winlogon.exe
C:\WINDOWS.0\system32\services.exe
C:\WINDOWS.0\system32\lsass.exe
C:\WINDOWS.0\system32\svchost.exe
C:\WINDOWS.0\system32\svchost.exe
C:\WINDOWS.0\System32\svchost.exe
C:\WINDOWS.0\system32\svchost.exe
C:\WINDOWS.0\system32\svchost.exe
C:\WINDOWS.0\system32\spoolsv.exe
C:\Program Files\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS.0\SOUNDMAN.EXE
C:\WINDOWS.0\system32\Rundll32.exe
C:\Program Files\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS.0\system32\RunDLL32.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\WINDOWS.0\system32\ctfmon.exe
C:\Program Files\DAEMON Tools\daemon.exe
C:\WINDOWS.0\System32\spool\DRIVERS\W32X86\3\E_FATICDE.EXE
C:\Program Files\Veoh Networks\Veoh\VeohClient.exe
C:\Program Files\a-squared Free\a2service.exe
C:\Program Files\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\WINDOWS.0\system32\CTsvcCDA.exe
C:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\FTRTSVC\0\FTRTSVC.exe
C:\WINDOWS.0\system32\nvsvc32.exe
C:\WINDOWS.0\system32\svchost.exe
C:\WINDOWS.0\system32\MsPMSPSv.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS.0\System32\alg.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\WINDOWS.0\explorer.exe
C:\Documents and Settings\Administrateur\Mes documents\divers\DD\utilitaire\xxx.exe

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,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://runonce.msn.com/runonce3.aspx
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: (no name) - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - (no file)
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: EpsonToolBandKicker Class - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - C:\Program Files\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O3 - Toolbar: EPSON Web-To-Page - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - C:\Program Files\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [P17Helper] Rundll32 P17.dll,P17Helper
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS.0\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [DAEMON Tools] "%ProgramFiles%\DAEMON Tools\daemon.exe\" -lang 1033
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Program Files\Unlocker\UnlockerAssistant.exe" -H
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SB Live! 24-bit\Surround Mixer\CTSysVol.exe /r
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS.0\UpdReg.EXE
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NvMediaCenter] RunDLL32.exe NvMCTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [Sony Ericsson PC Suite] "C:\Program Files\Sony Ericsson\Mobile2\Application Launcher\Application Launcher.exe" /startoptions
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime Alternative\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS.0\system32\ctfmon.exe
O4 - HKCU\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKCU\..\Run: [EPSON Stylus DX7400 Series] C:\WINDOWS.0\System32\spool\DRIVERS\W32X86\3\E_FATICDE.EXE /FU "C:\WINDOWS.0\TEMP\E_S9D.tmp" /EF "HKCU"
O4 - HKCU\..\Run: [Veoh] "C:\Program Files\Veoh Networks\Veoh\VeohClient.exe" /VeohHide
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~1\Office12\EXCEL.EXE/3000
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: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\Office12\REFIEBAR.DLL
O11 - Options group: [INTERNATIONAL] International*
O11 - Options group: [TABS] Tabbed Browsing
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} (Java Runtime Environment 1.6.0) - http://javadl-esd.sun.com/update/1.6.0/jinstall-6u3-windows-i586-jc.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{14B601DA-28E8-4B38-9303-C36A7DBC336E}: NameServer = 85.255.116.110,85.255.112.108
O17 - HKLM\System\CCS\Services\Tcpip\..\{A550EA97-FAF5-436E-8768-4D61B396D71E}: NameServer = 85.255.116.110,85.255.112.108
O17 - HKLM\System\CCS\Services\Tcpip\..\{F129A690-F9B8-4B34-8DA2-26B85E735CD2}: NameServer = 85.255.116.110,85.255.112.108
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 85.255.116.110 85.255.112.108
O17 - HKLM\System\CS1\Services\Tcpip\..\{14B601DA-28E8-4B38-9303-C36A7DBC336E}: NameServer = 85.255.116.110,85.255.112.108
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 85.255.116.110 85.255.112.108
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Program Files\Fichiers communs\Microsoft Shared\Help\hxds.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945} - C:\PROGRA~1\FICHIE~1\MICROS~1\OFFICE12\MSOXMLMF.DLL
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS.0\system32\wpdshserviceobj.dll
O23 - Service: a-squared Free Service (a2free) - Emsi Software GmbH - C:\Program Files\a-squared Free\a2service.exe
O23 - Service: AntiVir PersonalEdition Classic Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Program Files\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS.0\system32\CTsvcCDA.exe
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom SA - C:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\FTRTSVC\0\FTRTSVC.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS.0\system32\nvsvc32.exe