Probleme trojan system 32\cart.dll

Bonjour,

Depuis le démarrage de mon ordinateur ce matin problème de trojan detecte par avast
son nom c:windows\system32\cart.dll\[UPX]
Après de nombreux essais de nettoyage (spyaware, spybot....) il est toujours la
du coup j'ai lancé hijackthis suivant la procedure explique sur ce site

voici le compte rendu
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:59:53, on 19/02/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
Boot mode: Safe mode

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:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\explorer.exe
C:\hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: free-downloads.net Toolbar - {ecdee021-0d17-467f-a1ff-c7a115230949} - C:\Program Files\free-downloads.net\tbfree.dll
O2 - BHO: BHO Class - {06358080-33BE-452b-9B31-E54E112ADCCA} - C:\WINDOWS\system32\MSIEMPlayer.DLL (file missing)
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll (file missing)
O2 - BHO: BitComet ClickCapture - {39F7E362-828A-4B5A-BCAF-5B79BFDFEA60} - D:\Dowlonds\tools\BitCometBHO_1.2.1.2.dll (file missing)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {C51FF64F-05A9-40BD-B87C-DC716C5AB844} - C:\WINDOWS\system32\card.dll
O2 - BHO: free-downloads.net Toolbar - {ecdee021-0d17-467f-a1ff-c7a115230949} - C:\Program Files\free-downloads.net\tbfree.dll
O3 - Toolbar: free-downloads.net Toolbar - {ecdee021-0d17-467f-a1ff-c7a115230949} - C:\Program Files\free-downloads.net\tbfree.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [IAAnotif] "C:\Program Files\Intel\Intel Matrix Storage Manager\Iaanotif.exe"
O4 - HKLM\..\Run: [Popup] "C:\Program Files\Dell SAS RAID Storage Manager\MegaPopup\Popup.exe"
O4 - HKLM\..\Run: [PMX Daemon] ICO.EXE
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [SigmatelSysTrayApp] stsystra.exe
O4 - HKLM\..\Run: [WavXMgr] C:\Program Files\Wave Systems Corp\Services Manager\Docmgr\bin\WavXDocMgr.exe
O4 - HKLM\..\Run: [SecureUpgrade] C:\Program Files\Wave Systems Corp\SecureUpgrade.exe
O4 - HKLM\..\Run: [EmbassySecurityCheck] "C:\Program Files\Wave Systems Corp\EMBASSY Security Setup\EMBASSYSecurityCheck.exe"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [{0228e555-4f9c-4e35-a3ec-b109a192b4c2}] d:\Gmail Notifier\gnotify.exe
O4 - HKLM\..\Run: [RoxioDragToDisc] "C:\Program Files\Roxio\Drag-to-Disc\DrgToDsc.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\ISUSPM.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [spywarefighterguard] C:\Program Files\SPYWAREfighter\spftray.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: [AlcoholAutomount] "C:\Program Files\Alcohol Soft\Alcohol 120\axcmd.exe" /automount
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
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')
O8 - Extra context menu item: &D&ownload &with BitComet - res://D:\Dowlonds\BitComet.exe/AddLink.htm
O8 - Extra context menu item: &D&ownload all video with BitComet - res://D:\Dowlonds\BitComet.exe/AddVideo.htm
O8 - Extra context menu item: &D&ownload all with BitComet - res://D:\Dowlonds\BitComet.exe/AddAllLink.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: BitComet - {D18A0B52-D63C-4ed0-AFC6-C1E3DC1AF43A} - res://D:\Dowlonds\tools\BitCometBHO_1.2.1.2.dll/206 (file missing)
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/...
O20 - Winlogon Notify: gemsafe - C:\Program Files\Gemplus\GemSafe Libraries\BIN\WLEventNotify.dll
O20 - Winlogon Notify: GoToAssist - C:\Program Files\Citrix\GoToAssist\480\G2AWinLogon.dll
O20 - Winlogon Notify: WLCtrl32 - C:\WINDOWS\SYSTEM32\WLCtrl32.dll
O21 - SSODL: WinApp - {C285CF22-115F-3252-41AC-F686D912C63D} - C:\WINDOWS\system32\clipuser32.dll
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Broadcom ASF IP Monitor (ASFIPmon) - Broadcom Corporation - C:\Program Files\Broadcom\ASFIPMon\AsfIpMon.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Fichiers communs\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: GoToAssist - Citrix Online, a division of Citrix Systems, Inc. - C:\Program Files\Citrix\GoToAssist\480\g2aservice.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\Iaantmon.exe
O23 - Service: Iap - Dell Inc. - C:\Program Files\Dell\OpenManage\Client\Iap.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: MRMonitor (MegaMonitorSrv) - Unknown owner - C:\Program Files\Dell SAS RAID Storage Manager\MegaMonitor\mrmonitor.exe (file missing)
O23 - Service: SSMFramework (MSMFramework) - Unknown owner - C:\Program Files\Dell SAS RAID Storage Manager\Framework\VivaldiFramework.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: SecureStorageService - Wave Systems Corp. - C:\Program Files\Wave Systems Corp\Secure Storage Manager\SecureStorageService.exe
O23 - Service: SPYWAREfighterRP - SpamFighter APS - C:\Program Files\SPYWAREfighter\spfprc.exe
O23 - Service: stllssvr - MicroVision Development, Inc. - C:\Program Files\Fichiers communs\SureThing Shared\stllssvr.exe
O23 - Service: NTRU TSS v1.2.1.25 TCS (tcsd_win32.exe) - Unknown owner - C:\Program Files\NTRU Cryptosystems\NTRU TCG Software Stack\bin\tcsd_win32.exe (file missing)
O23 - Service: TdmService - Wave Systems Corp. - C:\Program Files\Wave Systems Corp\Trusted Drive Manager\TdmService.exe
O23 - Service: WaveEnrollmentService - Wave Systems Corp. - C:\Program Files\Wave Systems Corp\Authentication Manager\WaveEnrollmentService.exe