Déconnection d'internet tous les 20 secondes

Bonjour,
j'ai un probleme avec mon connection internet que j'ai acces a partir d'orange net.en effet j'utilise le modem samba usbmuni d'un carte sim téléphonique pour me connecter a internet a ,maintenant tous les 20 secondes je me déconnecte automatiquement sans mon autorisation,j'ai deja essayer avec ccleaner,avg antispyware mais le resultat reste toujours les mêmes!TOUS LES 20 s je me deconnecte automatiquement.je vous remet aussi le rapport hijackthis pour plus de détail.
je vous remercie d'avance pour l'aide que vous allez me donner!!!

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:28:34, on 21/04/2008
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\Program Files\Canon\DIAS\CnxDIAS.exe
C:\Program Files\Symantec AntiVirus\DefWatch.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\pctspk.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Symantec AntiVirus\Rtvscan.exe
C:\WINDOWS\System32\wdfmgr.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\WINDOWS\System32\hkcmd.exe
C:\WINDOWS\System32\igfxpers.exe
C:\Program Files\Orange Madagascar Booster\slipcore.exe
C:\Program Files\Java\jre1.5.0_12\bin\jusched.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\Program Files\ScanSoft\OmniPageSE2.0\OpwareSE2.exe
C:\WINDOWS\System32\rundll32.exe
C:\WINDOWS\System32\Rundll32.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\SuperCopier2\SuperCopier2.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Ciel\Serveur\WSRV.exe
C:\Program Files\Orange Madagascar Booster\slipgui.exe
C:\Program Files\Yahoo!\Messenger\ymsgr_tray.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
D:\utilitaire\HiJackThis.exe
C:\WINDOWS\System32\wbem\wmiprvse.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaults/sb/msgr8/*http://www.yahoo.com/ext/search/search.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaults/sp/msgr8/*https://fr.yahoo.com/?p=us
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://fr.yahoo.com/?p=us
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://us.rd.yahoo.com/customize/ie/defaults/su/msgr8/*https://fr.yahoo.com/?p=us
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaults/sb/msgr8/*http://www.yahoo.com/ext/search/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaults/sp/msgr8/*https://fr.yahoo.com/?p=us
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.yahoo.com/?p=us
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://us.rd.yahoo.com/customize/ie/defaults/su/msgr8/*https://fr.yahoo.com/?p=us
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SrchHook Class - {F4F10C1D-87C7-404A-B4B3-000000000000} - C:\PROGRA~1\DAP\SBSearch.dll (file missing)
R3 - URLSearchHook: (no name) - {9CB65206-89C4-402c-BA80-02D8C59F9B1D} - C:\Program Files\AskTBar\SrchAstt\2.bin\A5SRCHAS.DLL
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Orange Madagascar Booster - {8B79EE88-E62D-4AA8-B530-CC357BA112B7} - C:\Program Files\Orange Madagascar Booster\Toolband.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Ask Toolbar - {FE063DB9-4EC0-403e-8DD8-394C54984B2C} - (no file)
O3 - Toolbar: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\System32\igfxpers.exe
O4 - HKLM\..\Run: [SlipStream] "C:\Program Files\Orange Madagascar Booster\slipcore.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_12\bin\jusched.exe
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [OpwareSE2] "C:\Program Files\ScanSoft\OmniPageSE2.0\OpwareSE2.exe"
O4 - HKLM\..\Run: [80304730] rundll32.exe "C:\WINDOWS\System32\ymntwfxn.dll",b
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [BM830374ac] Rundll32.exe "C:\WINDOWS\System32\fwfkwcyn.dll",s
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [SuperCopier2.exe] C:\Program Files\SuperCopier2\SuperCopier2.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Ciel Serveur.lnk = C:\Program Files\Ciel\Serveur\WSRV.exe
O4 - Global Startup: Comptine.lnk = C:\Program Files\EDTA\Comptine\comptine.exe
O4 - Global Startup: Orange Madagascar Booster.lnk = C:\Program Files\Orange Madagascar Booster\slipgui.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_12\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_12\bin\ssv.dll
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O16 - DPF: {1A26F07F-0D60-4835-91CF-1E1766A0EC56} - http://scanner2.malware-scan.com/setup/webinst_fr.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (Installation Support) - C:\Program Files\Yahoo!\Common\Yinsthelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{517B7BA8-9A44-49E4-B4BC-E41E15883CA4}: NameServer = 10.150.0.130,10.150.0.131
O17 - HKLM\System\CCS\Services\Tcpip\..\{65D6E779-1EDF-4CE3-8962-5C31FC239AD8}: NameServer = 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131 10.150.0.130 10.150.0.131
O17 - HKLM\System\CS1\Services\Tcpip\..\{517B7BA8-9A44-49E4-B4BC-E41E15883CA4}: NameServer = 10.150.0.130,10.150.0.131
O17 - HKLM\System\CS2\Services\Tcpip\..\{517B7BA8-9A44-49E4-B4BC-E41E15883CA4}: NameServer = 10.150.0.130,10.150.0.131
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: C-DillaCdaC11BA - C-Dilla Ltd - C:\WINDOWS\System32\drivers\CDAC11BA.EXE
O23 - Service: Canon Driver Information Assist Service - CANON INC. - C:\Program Files\Canon\DIAS\CnxDIAS.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
O23 - Service: Symantec AntiVirus Definition Watcher (DefWatch) - Symantec Corporation - C:\Program Files\Symantec AntiVirus\DefWatch.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Microsoft System Management - Unknown owner - C:\WINDOWS\System32\system.exe (file missing)
O23 - Service: PCTEL Speaker Phone (Pctspk) - PCtel, Inc. - C:\WINDOWS\system32\pctspk.exe
O23 - Service: SAVRoam (SavRoam) - symantec - C:\Program Files\Symantec AntiVirus\SavRoam.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec AntiVirus - Symantec Corporation - C:\Program Files\Symantec AntiVirus\Rtvscan.exe