Bonjour, 
mon pc est infecté par ms removal tools. Plus de fond d'écran,impossible de me connecter à internet, boite mail...à partir de ma session. 
J'ai téléchargé Spyhunter mais impossible de le lancer (message d'erreur me disant que je dois réinstaller "Windows installer")   
  
  
Voici un rapport HijackThis (j'ai eu aussi un message d'erreur m'indiquant que le système a refusé l'accès aux "Hostfile") 
  
  
 Logfile of Trend Micro HijackThis v2.0.2 
Scan saved at 18:49:57, on 31/03/2011 
Platform: Windows XP SP3 (WinNT 5.01.2600) 
MSIE: Internet Explorer v7.00 (7.00.6000.17095) 
Boot mode: Normal 
  
Running processes: 
C:\WINDOWS\Explorer.EXE 
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe 
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe 
C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe 
C:\Program Files\QuickTime\QTTask.exe 
C:\Program Files\iTunes\iTunesHelper.exe 
C:\WINDOWS\system32\ctfmon.exe 
C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe 
C:\Program Files\Windows Live\Messenger\msnmsgr.exe 
C:\Program Files\Mozilla Firefox\firefox.exe 
C:\Program Files\Mozilla Thunderbird\thunderbird.exe 
C:\Program Files\Mozilla Firefox\plugin-container.exe 
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe 
  
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = MSN : Hotmail, Messenger, Bing, Actualité et Sport 
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = Bing 
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = Bing 
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = Windows Live 
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens 
O2 - BHO: (no name) - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - (no file) 
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll 
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file) 
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: Java Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll 
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll 
O3 - Toolbar: Barre d'outils MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar\01.01.2607.0\fr\msntb.dll 
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe"  -osboot 
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min 
O4 - HKLM\..\Run: [sunJavaUpdateSched] "C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe" 
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe" 
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Fichiers communs\Adobe\ARM\1.0\AdobeARM.exe" 
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime 
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe" 
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k 
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe 
O4 - HKCU\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime 
O4 - HKCU\..\Run: [bgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe" 
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background 
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM') 
O4 - HKUS\S-1-5-18\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background (User 'SYSTEM') 
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user') 
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe 
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE 
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000 
O9 - Extra button: Create Mobile Favorite - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll 
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll 
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.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: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204 
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-FR/a-UNO1/GAME_UNO1.cab 
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - Free Online Virus Scan - BitDefender Online Scanner 
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1074362386750 
O16 - DPF: {B79A53C0-1DAC-4636-BACE-FD086A7A79BF} (AdSignerLCContrl Class) - https://static.impots.gouv.fr/tdir/static/adpform/AdSignerADP.cab 
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab 
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL 
O23 - Service: Avira AntiVir Planificateur (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe 
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe 
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\AppleMobileDeviceService.exe 
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe 
O23 - Service: Boonty Games - BOONTY - C:\Program Files\Fichiers communs\BOONTY Shared\Service\Boonty.exe 
O23 - Service: CyberLink Background Capture Service (CBCS) (CLCapSvc) - Unknown owner - c:\Apps\Powercinema\Kernel\TV\CLCapSvc.exe 
O23 - Service: CyberLink Task Scheduler (CTS) (CLSched) - Unknown owner - c:\Apps\Powercinema\Kernel\TV\CLSched.exe 
O23 - Service: CyberLink Media Library Service - Cyberlink - C:\Program Files\CyberLink\Shared Files\CLML_NTService\CLMLServer.exe 
O23 - Service: Pare-feu personnel G DATA (GDFwSvc) - Unknown owner - C:\Program Files\AVK InternetSecurity\Firewall\GDFwSvc.exe (file missing) 
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe 
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe 
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE 
  
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End of file - 7368 bytes 
  
  
  
Merci de m'aider à me débarrasser de cette cochonnerie...