Problème trojan downloader.xs

Bonjour à tous,

j'ai un soucis de compréhension sur une de vos discussion à propos de trojan downloader.xs et des fenêtres intempestives, j'avais avast et j'ai télécharger plusieurs anti-virus comme PC tools, hijackthis, navilog1 (si besoin).

Aucun de tous ces antivirus n'est capable de me détruire ce fichu virus. en espérant d'avoir une réponse assez rapidement et surtout assez claire (avant de balancer mon ordi par la fenêtre), je vous donne l'analyse de hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19:02:38, on 08/04/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
Boot mode: Normal

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\Ati2evxx.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\Ati2evxx.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\eHome\ehRecvr.exe
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Spyware Doctor\pctsAuxs.exe
C:\Program Files\Spyware Doctor\pctsSvc.exe
C:\WINDOWS\Explorer.EXE
C:\Documents and Settings\All Users\Application Data\rqjeripw\zejypozu.exe
C:\WINDOWS\ehome\ehtray.exe
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\Analog Devices\SoundMAX\Smax4.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.EXE
C:\Program Files\Spyware Doctor\pctsTray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Ares\Ares.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\DAEMON Tools\daemon.exe
C:\WINDOWS\system32\rkxcvezi.exe
C:\Program Files\ASUS WiFi-AP Solo\RtWLan.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\OpenOffice.org 2.3\program\soffice.exe
C:\WINDOWS\ehome\mcrdsvc.exe
C:\Program Files\OpenOffice.org 2.3\program\soffice.BIN
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\dllhost.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\eHome\ehmsas.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Java\jre1.6.0_02\bin\jucheck.exe
C:\Program Files\Alwil Software\Avast4\ashSimpl.exe
C:\Documents and Settings\user\Mes documents\HiJackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O3 - Toolbar: vnbptxlf - {2A800B4E-351C-4230-B792-D73A5EA9CB31} - C:\WINDOWS\vnbptxlf.dll
O4 - HKLM\..\Run: [ehTray] C:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SoundMAX] "C:\Program Files\Analog Devices\SoundMAX\Smax4.exe" /tray
O4 - HKLM\..\Run: [StartCCC] C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [78032471] rundll32.exe "C:\WINDOWS\system32\rqcvqpbl.dll",b
O4 - HKLM\..\Run: [ISTray] "C:\Program Files\Spyware Doctor\pctsTray.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: [ares] "C:\Program Files\Ares\Ares.exe" -h
O4 - HKCU\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKCU\..\Run: [AdobeUpdater] C:\Program Files\Fichiers communs\Adobe\Updater5\AdobeUpdater.exe
O4 - HKCU\..\Run: [swkiqkjv] C:\WINDOWS\system32\rkxcvezi.exe
O4 - HKLM\..\Policies\Explorer\Run: [YL5Roy6tRA] C:\Documents and Settings\All Users\Application Data\rqjeripw\zejypozu.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
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')
O4 - Startup: OpenOffice.org 2.3.lnk = C:\Program Files\OpenOffice.org 2.3\program\quickstart.exe
O4 - Startup: Registration RAYMAN
O4 - Global Startup: ASUS WiFi-AP Solo.lnk = ?
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: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O23 - Service: Ares Chatroom server (AresChatServer) - Ares Development Group - C:\Documents and Settings\user\Mes documents\Ares\chatServer.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.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: DiRT Drivers Auto Removal (pr2ah4nc) (pr2ah4nc) - CODEMASTERS - C:\WINDOWS\system32\pr2ah4nc.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - C:\Program Files\Spyware Doctor\pctsAuxs.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - C:\Program Files\Spyware Doctor\pctsSvc.exe