Virus internet

Bonjour,
J'ai un problème que je ne sais pas résoudre! Lorsque je lance internet ex: google, j'ai des pages de sites qui s'affichent et surtout des pornos!!!! Je ne trouve pas la cause? Merci de m'aider, car j'ai des enfants en bas ages
Logfile of HijackThis v1.99.1
Scan saved at 13:32:33, on 31/05/2005
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:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\Program Files\Norton Internet Security\NISUM.EXE
C:\Program Files\Norton Internet Security\ccPxySvc.exe
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\MsPMSPSv.exe
C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Creative\ShareDLL\CtNotify.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\Program Files\Creative\SBLive\RemoteCenter\Rc\Rcman.exe
C:\Program Files\Creative\ShareDLL\MEDIADET.EXE
C:\WINDOWS\system32\devldr32.exe
C:\PROGRA~1\INCRED~1\bin\IMApp.exe
C:\WINDOWS\system32\winlogon.exe
C:\Program Files\Creative\SBLive\RemoteCenter\Rc\OSDMenu.EXE
C:\Program Files\Creative\SBLive\RemoteCenter\Rc\EAX.exe
C:\Program Files\Creative\SBLive\RemoteCenter\Rc\VRC.exe
C:\Program Files\Creative\SBLive\RemoteCenter\Center\RCenter.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Documents and Settings\svabek\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: ohb - {49256FE8-6394-4ACE-939C-22F35CA042AD} - C:\WINDOWS\system32\zippy.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [Disc Detector] C:\Program Files\Creative\ShareDLL\CtNotify.exe
O4 - HKLM\..\Run: [CTStartup] C:\Program Files\Creative\Splash Screen\CTEaxSpl.EXE /run
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [ccRegVfy] "C:\Program Files\Fichiers communs\Symantec Shared\ccRegVfy.exe"
O4 - HKLM\..\Run: [LXBUCATS] rundll32 C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\LXBUtime.dll,_RunDLLEntry@16
O4 - HKCU\..\Run: [RemoteCenter] C:\Program Files\Creative\SBLive\RemoteCenter\Rc\Rcman.exe
O4 - HKCU\..\Run: [IncrediMail] C:\Program Files\IncrediMail\bin\IncMail.exe /c
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Add animation to IncrediMail Style Box - C:\PROGRA~1\INCRED~1\bin\resources\WebMenuImg.htm
O8 - Extra context menu item: &eBay Search - res://C:\Program Files\eBay\eBay Toolbar2\eBayTb.dll/RCSearch.html
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://C:\Program Files\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Pages liées - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
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: fdjeux - https://www.fdjeux.net/classes/fdjeux.cab
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation Service (ccPwdSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Proxy Service (ccPxySvc) - Symantec Corporation - C:\Program Files\Norton Internet Security\ccPxySvc.exe
O23 - Service: lxbu_device - Lexmark International, Inc. - C:\WINDOWS\system32\lxbucoms.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton Internet Security Accounts Manager (NISUM) - Symantec Corporation - C:\Program Files\Norton Internet Security\NISUM.EXE
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe