Trojan-downloader.win32.agent.aii'-au secours

Bonjour,
un petit appel d'un novice aux habitués du combat contre les malware.
Depuis 2 semaines, kaspersky me signale la presence du trojan suivant : trojan-downloader.win32.agent.aii'. qui serait present dans le ficher : c:documents and setting\all users\documents\setup.exe. Je le supprime a chq fois par l'intermediaire de Kaspersky mais il revient tjrs plus souvent. j ai vu qu un rapport de hijackthis vous eté utile, le voici :

Logfile of HijackThis v1.99.1
Scan saved at 20:22:15, on 17/01/2007
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\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:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
c:\program files\fichiers communs\logitech\lvmvfm\LVPrcSrv.exe
E:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe
C:\WINDOWS\system32\drivers\CDAC11BA.EXE
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\DAEMON Tools\daemon.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\Program Files\MessengerPlus! 3\MsgPlus.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0T1.EXE
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
E:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Logitech\Profiler\lwemon.exe
D:\jeux\gamez\steam\steam.exe
E:\Program Files\SuperCopier2\SuperCopier2.exe
E:\Program Files\Common\Bin\WinCinemaMgr.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\WgaTray.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Outlook Express\msimn.exe
C:\Documents and Settings\mitchleouf\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [EPSON Stylus C46 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0T1.EXE /P23 "EPSON Stylus C46 Series" /O6 "USB001" /M "Stylus C46"
O4 - HKLM\..\Run: [WinampAgent] e:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [AVP] "E:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe"
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Start WingMan Profiler] "C:\Program Files\Logitech\Profiler\lwemon.exe" /noui
O4 - HKCU\..\Run: [Steam] "d:\jeux\gamez\steam\steam.exe" -silent
O4 - HKCU\..\Run: [SuperCopier2.exe] e:\Program Files\SuperCopier2\SuperCopier2.exe
O4 - Global Startup: InterVideo WinCinema Manager.lnk = E:\Program Files\Common\Bin\WinCinemaMgr.exe
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://E:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: Antivirus Internet - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - E:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\scieplugin.dll
O9 - Extra button: Titan Poker - {49783ED4-258D-4f9f-BE11-137C18D3E543} - D:\jeux\gamez\Titan Poker\casino.exe
O9 - Extra 'Tools' menuitem: Titan Poker - {49783ED4-258D-4f9f-BE11-137C18D3E543} - D:\jeux\gamez\Titan Poker\casino.exe
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - E:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - D:\jeux\gamez\partypoker\PartyPoker\RunApp.exe (file missing)
O9 - Extra 'Tools' menuitem: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - D:\jeux\gamez\partypoker\PartyPoker\RunApp.exe (file missing)
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: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {A8482EAF-A1F3-4934-AE3F-56EB195A50BF} (DeskUpdate- Activex Control) - https://www.songtexte.de
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - AppInit_DLLs: MsgPlusLoader.dll
O20 - Winlogon Notify: klogon - C:\WINDOWS\system32\klogon.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Kaspersky Anti-Virus 6.0 (AVP) - Unknown owner - E:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe" -r (file missing)
O23 - Service: Boonty Games - BOONTY - C:\Program Files\Fichiers communs\BOONTY Shared\Service\Boonty.exe
O23 - Service: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\system32\drivers\CDAC11BA.EXE
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Logitech Process Monitor (LVPrcSrv) - Logitech Inc. - c:\program files\fichiers communs\logitech\lvmvfm\LVPrcSrv.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Roxio UPnP Renderer 9 - Unknown owner - C:\Program Files\Fichiers communs\Sonic Shared\RoxioUPnPRenderer9.exe (file missing)
O23 - Service: Roxio Upnp Server 9 - Unknown owner - C:\Program Files\Fichiers communs\Sonic Shared\RoxioUpnpService9.exe (file missing)
O23 - Service: LiveShare P2P Server 9 (RoxLiveShare9) - Unknown owner - C:\Program Files\Fichiers communs\Roxio Shared\9.0\SharedCOM\RoxLiveShare9.exe (file missing)
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - Unknown owner - %ProgramFiles%\WinPcap\rpcapd.exe" -d -f "%ProgramFiles%\WinPcap\rpcapd.ini (file missing)
O23 - Service: stllssvr - Unknown owner - C:\Program Files\Fichiers communs\SureThing Shared\stllssvr.exe (file missing)

Si vous avez deja rencontré le souci, merci d'avance de votre aide. et si ce rapport vous donne plus d infos sur l infection de mon systeme, je suis , bien sur, preneur.

Merci d 'avance pour votre aide.