Virus générant ma deconnexion d'internet

Bonjour
Je suis deconnecté d'internet regulièrement, toutes les 15 mn. Mon FAi m'explique qu'il y a probablement un virus.
Je vous joins ma log HijackThis.

Merci de votre aide

Logfile of HijackThis v1.99.1
Scan saved at 12:32:13, on 17/06/2007
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:\WINNT\system32\spoolsv.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINNT\system32\cisvc.exe
C:\WINNT\system32\drivers\dcfssvc.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\ewido anti-spyware 4.0\guard.exe
C:\WINNT\system32\nvsvc32.exe
F:\Program Files\kodak\KODAK EASYSHARE Software\bin\ptssvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\tcpsvcs.exe
C:\WINNT\System32\snmp.exe
C:\WINNT\system32\stisvc.exe
C:\WINNT\system32\ZoneLabs\vsmon.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\WINNT\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Softwin\BitDefender8\bdmcon.exe
C:\Program Files\Softwin\BitDefender8\bdnagent.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Zone Labs\ZoneAlarm\zapro.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Administrateur\Bureau\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://www.bing.com/?cc=fr&toHttps=1&redig=55729C844D6A45819CAD368B3E178C9F
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll (file missing)
O3 - Toolbar: Barre d'outils MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar\01.01.2607.0\fr\msntb.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [BDMCon] "C:\Program Files\Softwin\BitDefender8\bdmcon.exe"
O4 - HKLM\..\Run: [BDNewsAgent] "C:\Program Files\Softwin\BitDefender8\bdnagent.exe"
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINNT\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Ouvrir le cadre dans une nouvelle fenêtre - C:\WINNT\web\OpenFrame.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll (file missing)
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll (file missing)
O9 - Extra button: ICQ 4.1 - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - F:\Program Files\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - F:\Program Files\ICQLite\ICQLite.exe
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINNT\System32\Shdocvw.dll
O14 - IERESET.INF: START_PAGE_URL=https://www.free.fr/freebox/index.html
O16 - DPF: ppctlcab -
O16 - DPF: teleir_cert -
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} -
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} -
O16 - DPF: {2FC9A21E-2069-4E47-8235-36318989DB13} -
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} -
O16 - DPF: {3BFFE033-BF43-11D5-A271-00A024A51325} -
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} -
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} -
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} -
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} -
O16 - DPF: {CAFEEFAC-0014-0001-0001-ABCDEFFEDCBA} -
O16 - DPF: {CAFEEFAC-0014-0002-0005-ABCDEFFEDCBA} -
O16 - DPF: {CAFEEFAC-0014-0002-0006-ABCDEFFEDCBA} -
O16 - DPF: {CAFEEFAC-0015-0000-0004-ABCDEFFEDCBA} -
O16 - DPF: {EF99BD32-C1FB-11D2-892F-0090271D4F88} -
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: Dcfssvc - Eastman Kodak Company - C:\WINNT\system32\drivers\dcfssvc.exe
O23 - Service: Service d'administration du Gestionnaire de disque logique (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: ewido anti-spyware 4.0 guard - Anti-Malware Development a.s. - C:\Program Files\ewido anti-spyware 4.0\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINNT\system32\nvsvc32.exe
O23 - Service: Pml Driver HPH11 - HP - C:\WINNT\system32\HPHipm11.exe
O23 - Service: ptssvc - KODAK - F:\Program Files\kodak\KODAK EASYSHARE Software\bin\ptssvc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs Inc. - C:\WINNT\system32\ZoneLabs\vsmon.exe
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)