Pub intempestives

Bonjour,

Depuis quelques jours j'ai des fenêtres intempestives qui s'ouvrent quand je vais sur le net. Voilà ce que m'a dit Hijack :

Logfile of HijackThis v1.99.1
Scan saved at 18:23:07, on 20/03/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Unable to get Internet Explorer version!

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\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Java\j2re1.4.2_05\bin\jusched.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\G DATA InternetSecurity\AVKTray\AVKTray.exe
C:\Program Files\QuickTime\qttask.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\Ahead\NEROPH~2\data\Xtras\mssysmgr.exe
C:\Program Files\G DATA InternetSecurity\Firewall\GDFirewallTray.exe
C:\Program Files\G DATA InternetSecurity\AVK\AVKService.exe
C:\Program Files\G DATA InternetSecurity\AVK\AVKWCtl.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Fichiers communs\G DATA\AVKProxy\AVKProxy.exe
C:\Program Files\G DATA InternetSecurity\Firewall\GDFwSvc.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Program Files\internet explorer 2\IEXPLORE.EXE
C:\DOCUME~1\PROPRI~1\LOCALS~1\Temp\Répertoire temporaire 1 pour hijackthis.zip\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: G DATA WebFilter Class - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G DATA InternetSecurity\Webfilter\AvkWebIE.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: G DATA WebFilter - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G DATA InternetSecurity\Webfilter\AvkWebIE.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\j2re1.4.2_05\bin\jusched.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [AVKTray] "C:\Program Files\G DATA InternetSecurity\AVKTray\AVKTray.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [PhotoShow Deluxe Media Manager] C:\PROGRA~1\Ahead\NEROPH~2\data\Xtras\mssysmgr.exe
O4 - Global Startup: G DATA Firewall Tray.lnk = ?
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.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\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
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
O17 - HKLM\System\CCS\Services\Tcpip\..\{5731DEFC-F35E-40A1-AC3C-06EF9C9273DB}: NameServer = 84.103.237.145 86.64.145.145
O23 - Service: AVKProxy - G DATA Software AG - C:\Program Files\Fichiers communs\G DATA\AVKProxy\AVKProxy.exe
O23 - Service: AVK Service (AVKService) - G DATA Software AG - C:\Program Files\G DATA InternetSecurity\AVK\AVKService.exe
O23 - Service: Gardien d'AVK (AVKWCtl) - Unknown owner - C:\Program Files\G DATA InternetSecurity\AVK\AVKWCtl.exe
O23 - Service: G DATA Personal Firewall (GDFwSvc) - Unknown owner - C:\Program Files\G DATA InternetSecurity\Firewall\GDFwSvc.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe

MERCI pour votre aide !!!!