Virus?

salut a tous voila g des gros probleme avec mon pc obligé de formater 2 fois et toujours pareil (virus je pense )voici le hijackLogfile of HijackThis v1.99.1
Scan saved at 09:33:36, on 30/12/2005
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\WINDOWS\System32\nvsvc32.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Ahead\InCD\InCD.exe
C:\WINDOWS\System32\spooIsv.exe
C:\Program Files\Softwin\BitDefender Free Edition\bdmcon.exe
C:\sddg.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\WINDOWS\System32\rundll32.exe
C:\WINDOWS\System32\wpabaln.exe
C:\WINDOWS\system32\cmd.exe
C:\WINDOWS\system32\ftp.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\PROGRA~1\HIJACK~1\HIJACK~1.EXE

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://votreportail.neuf.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://home.neuf.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [InCD] C:\Program Files\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\System32\\NeroCheck.exe
O4 - HKLM\..\Run: [Client Server Runtime Process] C:\WINDOWS\System32\csrs.exe
O4 - HKLM\..\Run: [Spooler SubSystem App] C:\WINDOWS\System32\spooIsv.exe
O4 - HKLM\..\Run: [Application Layer Gateway Service] C:\WINDOWS\System32\algs.exe
O4 - HKLM\..\Run: [BDMCon] C:\Program Files\Softwin\BitDefender Free Edition\\bdmcon.exe
O4 - HKLM\..\Run: [BDNewsAgent] C:\Program Files\Softwin\BitDefender Free Edition\\bdnagent.exe
O4 - HKLM\..\Run: [symwsc.exe] C:\sddg.exe
O4 - HKLM\..\Run: [Configuration Loader] scvhost.exe
O4 - HKLM\..\RunServices: [Configuration Loader] scvhost.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [NVIEW] rundll32.exe nview.dll,nViewLoadHook
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1135532826877
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2005111401/housecall.trendmicro.com/housecall/xscan53.cab
O23 - Service: AntiVir Service (AntiVirService) - Unknown owner - C:\Program Files\AVPersonal\AVGUARD.EXE (file missing)
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
O23 - Service: Hardware Clock Driver (hwclock) - Unknown owner - C:\WINDOWS\System32\hwclock.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: BitDefender Communicator (XCOMM) - Softwin - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe

this merci pour votre aide!!!