Bonjour,
Je suis infecté par plusieurs virus, et je n'arrive pas a m'en débarrasser, merci de bien vouloir m'aider. J'ai fait un rapport Hijackthis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13:20:26, on 11/11/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\Ati2evxx.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\system32\spoolsv.exe
D:\Program Files\Avira\AntiVir Desktop\sched.exe
D:\Program Files\Avira\AntiVir Desktop\avguard.exe
D:\WINDOWS\system32\Ati2evxx.exe
D:\WINDOWS\Explorer.EXE
D:\Program Files\TortoiseSVN\bin\TSVNCache.exe
D:\WINDOWS\RTHDCPL.EXE
D:\Program Files\Common Files\LogiShrd\LComMgr\Communications_Helper.exe
D:\Program Files\Logitech\QuickCam\Quickcam.exe
D:\Program Files\Avira\AntiVir Desktop\avgnt.exe
D:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
D:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe
D:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
D:\WINDOWS\system32\ctfmon.exe
D:\Program Files\Skype\Phone\Skype.exe
D:\program files\steam\steam.exe
D:\Program Files\EDIMAX\Common\RaUI.exe
D:\Program Files\Bonjour\mDNSResponder.exe
D:\Program Files\LogMeIn Hamachi\hamachi-2.exe
D:\Program Files\Java\jre6\bin\jqs.exe
D:\Program Files\Common Files\LogiShrd\LVCOMSER\LVComSer.exe
D:\Program Files\Common Files\LogiShrd\LVMVFM\LVPrcSrv.exe
D:\Program Files\PC Tools Firewall Plus\FWService.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\Common Files\LogiShrd\LVCOMSER\LVComSer.exe
D:\Program Files\Common Files\Logishrd\LQCVFX\COCIManager.exe
D:\Program Files\Skype\Plugin Manager\skypePM.exe
D:\WINDOWS\system32\wuauclt.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Mozilla Firefox\firefox.exe
D:\Program Files\Skype\Toolbars\Shared\SkypeNames.exe
D:\Documents and Settings\Rockfr92\My Documents\Téléchargements\hijackthis-2.0.2.exe
D:\DOCUME~1\Rockfr92\LOCALS~1\Temp\hijackthis-2.0.2.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: ContributeBHO Class - {074C1DC5-9320-4A9A-947D-C042949C6216} - D:\Program Files\Adobe\/Adobe Contribute CS3/contributeieplugin.dll
O2 - BHO: Adobe PDF Conversion Toolbar Helper - {AE7CD045-E861-484f-8273-0445EE161910} - D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - D:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - D:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Contribute Toolbar - {517BDDE4-E3A7-4570-B21E-2B52B6139FC7} - D:\Program Files\Adobe\/Adobe Contribute CS3/contributeieplugin.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [LogitechCommunicationsManager] "D:\Program Files\Common Files\LogiShrd\LComMgr\Communications_Helper.exe"
O4 - HKLM\..\Run: [LogitechQuickCamRibbon] "D:\Program Files\Logitech\QuickCam\Quickcam.exe" /hide
O4 - HKLM\..\Run: [Adobe_ID0EYTHM] D:\PROGRA~1\COMMON~1\Adobe\ADOBEV~1\Server\bin\VERSIO~2.EXE
O4 - HKLM\..\Run: [StartCCC] "D:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [avgnt] "D:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [BootSkin Startup Jobs] "D:\Program Files\Stardock\WinCustomize\BootSkin\BootSkin.exe" /StartupJobs
O4 - HKLM\..\Run: [Universal Serial Bus device] usb_magr.exe
O4 - HKLM\..\Run: [00PCTFW] "D:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe" -s
O4 - HKLM\..\Run: [QuickTime Task] "D:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [Windows Data Serivce] msinfo.exe
O4 - HKLM\..\Run: [WMI Partition Manager] D:\WINDOWS\system32\wmispvc.exe
O4 - HKLM\..\Run: [mx76SJBAbE1Qpw] D:\WINDOWS\Sf3TJ.exe
O4 - HKCU\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Skype] "D:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [Steam] "d:\program files\steam\steam.exe" -silent
O4 - HKCU\..\Run: [pldELx9gvdHT9M82] D:\WINDOWS\Sf3TJ.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\CTFMON.EXE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] D:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Wireless Utility.lnk = D:\Program Files\EDIMAX\Common\RaUI.exe
O8 - Extra context menu item: Ajouter au fichier PDF existant - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir en Adobe PDF - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en Adobe PDF - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en un fichier PDF existant - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir la sélection en Adobe PDF - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la sélection en un fichier PDF existant - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir les liens sélectionnés en fichier Adobe PDF - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convertir les liens sélectionnés en un fichier PDF existant - res://D:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - D:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - D:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - D:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: Adobe Version Cue CS3 {fr_FR} (Adobe Version Cue CS3) - Adobe Systems Incorporated - D:\Program Files\Common Files\Adobe\Adobe Version Cue CS3\Server\bin\VersionCueCS3.exe
O23 - Service: Avira AntiVir Planificateur (AntiVirSchedulerService) - Avira GmbH - D:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - D:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - D:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - D:\WINDOWS\system32\ati2sgag.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - D:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Findbasic Service - Unknown owner - D:\Documents and Settings\All Users\Application Data\Findbasic\findbasic127.exe (file missing)
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - D:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: LogMeIn Hamachi 2.0 Tunneling Engine (Hamachi2Svc) - LogMeIn Inc. - D:\Program Files\LogMeIn Hamachi\hamachi-2.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - D:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - D:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: LVCOMSer - Logitech Inc. - D:\Program Files\Common Files\LogiShrd\LVCOMSER\LVComSer.exe
O23 - Service: Process Monitor (LVPrcSrv) - Logitech Inc. - D:\Program Files\Common Files\LogiShrd\LVMVFM\LVPrcSrv.exe
O23 - Service: PC Tools Firewall Plus (PCToolsFirewallPlus) - PC Tools - D:\Program Files\PC Tools Firewall Plus\FWService.exe
End of file - 8856 bytes

Configuration: Windows XP
Firefox 3.5.3