Problème d'affichage de ma page de demarrage

Bonjour,
Merci d'avoir répondu. J'ai passé Hijack This et j'aimerais savoir ce que je dois virer.
Le problème est le suivant, dès que j'ouvre internet, quelques minutes après j'ai about blank qui se met en page de démarrage.
Merci de me répondre et dis moi stp, ce que je dois viré et faire après.
bye

Logfile of HijackThis v1.98.2
Scan saved at 15:30:18, on 16/11/2004
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccProxy.exe
C:\PCritNT\Criteria.exe
C:\WINNT\System32\svchost.exe
C:\PROGRA~1\Iomega\System32\AppServices.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINNT\System32\mnmsrvc.exe
C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe
C:\WINNT\dxwinini.bak:chovc
C:\Program Files\Norton Internet Security\Norton AntiVirus\SAVScan.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\system32\stisvc.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\faxsvc.exe
C:\WINNT\Explorer.EXE
C:\Program Files\Acer\Launch Manager\LaunchAp.exe
C:\Program Files\Acer\Launch Manager\PowerKey.exe
C:\Program Files\Acer\Launch Manager\HotkeyApp.exe
C:\Program Files\Acer\Launch Manager\KeyHook.exe
C:\Program Files\Acer\Launch Manager\CtrlVol.exe
C:\Program Files\Iomega\DriveIcons\ImgIcon.exe
C:\Program Files\ScanSoft\OmniPageSE\opware32.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\WINNT\LTSMMSG.exe
C:\WINNT\system32\ielt32.exe
C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE
C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
C:\Program Files\Microsoft ActiveSync\WCESMgr.exe
C:\Program Files\Microsoft Office\Office10\OUTLOOK.EXE
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\Microsoft Office\Office10\WINWORD.EXE
C:\Documents and Settings\Administrateur\Bureau\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINNT\ufnlk.dll/sp.html#37049
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.free.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINNT\ufnlk.dll/sp.html#37049
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINNT\ufnlk.dll/sp.html#37049
R3 - Default URLSearchHook is missing
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O2 - BHO: (no name) - {D4C97FF5-0707-D49B-02CB-B7996791E620} - C:\WINNT\sdkgr32.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [LaunchAp] "C:\Program Files\Acer\Launch Manager\LaunchAp.exe"
O4 - HKLM\..\Run: [PowerKey] "C:\Program Files\Acer\Launch Manager\PowerKey.exe"
O4 - HKLM\..\Run: [HotkeyApp] "C:\Program Files\Acer\Launch Manager\HotkeyApp.exe"
O4 - HKLM\..\Run: [KeyHook] "C:\Program Files\Acer\Launch Manager\KeyHook.exe"
O4 - HKLM\..\Run: [CtrlVol] "C:\Program Files\Acer\Launch Manager\CtrlVol.exe"
O4 - HKLM\..\Run: [Iomega Drive Icons] C:\Program Files\Iomega\DriveIcons\ImgIcon.exe
O4 - HKLM\..\Run: [Deskup] C:\Program Files\Iomega\DriveIcons\deskup.exe /IMGSTART
O4 - HKLM\..\Run: [Omnipage] C:\Program Files\ScanSoft\OmniPageSE\opware32.exe
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [URLLSTCK.exe] C:\Program Files\Norton Internet Security\UrlLstCk.exe
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Program Files\Fichiers communs\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe
O4 - HKLM\..\Run: [LTSMMSG] LTSMMSG.exe
O4 - HKLM\..\Run: [ielt32.exe] C:\WINNT\system32\ielt32.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [LiveSrv] rundll32.exe C:\WINNT\system32\LiveService_9.dll,GoService
O4 - Global Startup: DSLMON.lnk = C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: Créer un Favori de l'appareil mobile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~4\INetRepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~4\INetRepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~4\INetRepl.dll
O16 - DPF: {62475759-9E84-458E-A1AB-5D2C442ADFDE} - http://a1540.g.akamai.net/7/1540/52/20040428/qtinstall.info.apple.com/saba/fr/win/QuickTimeInstaller.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{002F6EED-14E6-4A75-80A2-1E4D814B7156}: NameServer = 213.228.0.212 212.27.32.177
O17 - HKLM\System\CS2\Services\Tcpip\..\{002F6EED-14E6-4A75-80A2-1E4D814B7156}: NameServer = 213.228.0.212 212.27.32.177