salut, je te remerci encore de t'occuper de mon cas (pas si desespere que ca, mais vraiment sur les nerfs a cause de ces s...)
j'ai suivi tes consignes a la lettre et voici le rapport hijackthis

Logfile of HijackThis v1.99.1
Scan saved at 01:17:24, on 25/09/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\RunDll32.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATI9CE.EXE
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Winamp\winampa.exe
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Softwin\BitDefender8\bdnagent.exe
C:\Program Files\Softwin\BitDefender8\bdoesrv.exe
C:\PROGRA~1\Nokia\NOKIAP~1\LAUNCH~1.EXE
C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe
C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe
C:\Program Files\CASIO\Photo Loader\Plauto.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\PROGRA~1\FICHIE~1\Nokia\MPAPI\MPAPI3s.exe
C:\Program Files\Fichiers communs\PCSuite\Services\ServiceLayer.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Softwin\BitDefender8\vsserv.exe
c:\program files\softwin\bitdefender8\bdmcon.exe
C:\WINDOWS\system32\svchost.exe
C:\DOCUME~1\HEENDR~1\LOCALS~1\Temp\61exinjs.d.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Heendrickxen\Local Settings\Temporary Internet Files\Content.IE5\W1EJ0DU7\HijackThis[1].exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.neufportail.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.microsoft.com/isapi/redir.dll?prd={SUB_PRD}&clcid={SUB_CLSID}&pver={SUB_PVER}&ar=home
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = http://ie.search.msn.com/{sub_rfc1766}/srchasst/srchcust.htm
R1 - HKLM\Software\Microsoft\Internet Explorer\Search,Default_Search_URL = http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://home.microsoft.com/access/autosearch.asp?p=%s
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: (no name) - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - (no file)
O3 - Toolbar: (no name) - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - (no file)
O3 - Toolbar: (no name) - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - (no file)
O4 - HKLM\..\Run: [Raccourci vers la page des propriétés de High Definition Audio] HDAudPropShortcut.exe
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [EPSON Stylus Photo RX420 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATI9CE.EXE /P31 "EPSON Stylus Photo RX420 Series" /O6 "USB001" /M "Stylus Photo RX420"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [BDMCon] C:\Program Files\Softwin\BitDefender8\bdmcon.exe
O4 - HKLM\..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [BDNewsAgent] C:\Program Files\Softwin\BitDefender8\bdnagent.exe
O4 - HKLM\..\Run: [BDOESRV] C:\Program Files\Softwin\BitDefender8\bdoesrv.exe
O4 - HKLM\..\Run: [PCSuiteTrayApplication] C:\PROGRA~1\Nokia\NOKIAP~1\LAUNCH~1.EXE -startup
O4 - HKLM\..\Run: [.nvsvc] C:\WINDOWS\system\smss.exe /w
O4 - HKCU\..\Run: [SpySweeper] "C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe" /0
O4 - HKCU\..\Run: [PcSync] C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe /NoDialog
O4 - Startup: TribalWeb.net.lnk = C:\Program Files\TribalWeb.net\tribalweb.exe
O4 - Global Startup: Supervision de Photo Loader.lnk = C:\Program Files\CASIO\Photo Loader\Plauto.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/eng/partner/default/kavwebscan_unicode.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - update.microsoft.com
O16 - DPF: {867E13F2-7F31-44FB-AC97-CD38E0DC46EF} (HardwareDetection Control) - http://drivers1.free.fr/telecharger.php?id 2&version O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - AppInit_DLLs: sockspy.dll sockspy.dll sockspy.dll sockspy.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\Fichiers communs\PCSuite\Services\ServiceLayer.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - Unknown owner - C:\Program Files\Softwin\BitDefender8\vsserv.exe" /service (file missing)
O23 - Service: Windows Log - Unknown owner - C:\WINDOWS\system32\nvsvcd.exe
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)