Demarrage Internet explorer 30 sec apres ok

Bonjour messieurs les génies du pc,

une question :
le premier lancement d'explorer ou de firefox apres le demarrage de l'ordinateur dure 30 sec, alors qu'avant ca se lancait automatiquement. Apres le premier lancement c'est ok.
Pourquoi donc, et comment regler le probleme ??

voici mon hijackthis log:

Logfile of HijackThis v1.99.1
Scan saved at 09:04:44, on 31/08/2006
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
C:\WINDOWS\System32\CTsvcCDA.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton AntiVirus\IWP\NPFMntor.exe
C:\WINDOWS\System32\HPZipm12.exe
C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
C:\Program Files\Fichiers communs\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\Program Files\Fichiers communs\Symantec Shared\Security Console\NSCSRVCE.EXE
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe
C:\Program Files\Creative\SBAudigy2ZS\DVDAudio\CTDVDDet.EXE
C:\WINDOWS\system32\CTHELPER.EXE
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Documents and Settings\frederic\Bureau\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://actus.sfr.fr
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://actus.sfr.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://actus.sfr.fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = https://actus.sfr.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: NAV Helper - {A8F38D8D-E480-4D52-B7A2-731BB6995FDD} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {C4069E3A-68F1-403E-B40E-20066696354B} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe /r
O4 - HKLM\..\Run: [CTDVDDET] C:\Program Files\Creative\SBAudigy2ZS\DVDAudio\CTDVDDet.EXE
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [SBDrvDet] C:\Program Files\Creative\SB Drive Det\SBDrvDet.exe /r
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.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: {01347765-1965-426B-91A4-AA6BB342B9A3} (InstallerObj Class) - http://www.1-click.com/common/files/installer-hidden-test.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site....
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O23 - Service: Adobe LM Service - Unknown owner - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\System32\CTsvcCDA.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Program Files\Fichiers communs\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: Norton AntiVirus Auto-Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Program Files\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: Norton Protection Center Service (NSCService) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\Security Console\NSCSRVCE.EXE
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe
O23 - Service: Symantec AVScan (SAVScan) - Symantec Corporation - C:\Program Files\Norton AntiVirus\SAVScan.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
O23 - Service: SPBBCSvc - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe


Merci d'avance
Radamanthe