Trojan !!!!

Bonjour,

J'ai été malheureusement infecté par un trojan, d'après le rapport de l'analyse de mon antivirus. Ce trojan se nomme : Trojan.Win32.Gorshok.a. Je ne peux m'en défaire, ni le désinfecter. Voici un rapport avec Hijack This :

C:\WINDOWS\System32\smss.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\spoolsv.exe
C:\Program Files\G DATA InternetSecurity TotalCare\AVK\AVKService.exe
C:\Program Files\G DATA InternetSecurity TotalCare\AVK\AVKWCtl.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Fichiers communs\G DATA\AVKProxy\AVKProxy.exe
C:\Program Files\G DATA InternetSecurity TotalCare\Firewall\GDFwSvc.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\RunDll32.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\G DATA InternetSecurity TotalCare\AVKTray\AVKTray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\G DATA InternetSecurity TotalCare\Firewall\GDFirewallTray.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\G DATA InternetSecurity TotalCare\AVKTuner\AVKTunerService.exe
C:\WINDOWS\system32\DllHost.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.orange.fr/portail
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
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
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.connect-we.fr/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,c:\program files\g data internetsecurity totalcare\avkkid\avkcks.exe
O2 - BHO: G DATA WebFilter Class - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G DATA InternetSecurity TotalCare\Webfilter\AvkWebIE.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O3 - Toolbar: G DATA WebFilter - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G DATA InternetSecurity TotalCare\Webfilter\AvkWebIE.dll
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe irprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [AVKTray] "C:\Program Files\G DATA InternetSecurity TotalCare\AVKTray\AVKTray.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.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 - Global Startup: G DATA Firewall Tray.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
O14 - IERESET.INF: START_PAGE_URL=http://www.unika.com
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: AVK Tuner Service - G DATA Software AG - C:\Program Files\G DATA InternetSecurity TotalCare\AVKTuner\AVKTunerService.exe
O23 - Service: AVKProxy - G DATA Software AG - C:\Program Files\Fichiers communs\G DATA\AVKProxy\AVKProxy.exe
O23 - Service: AVK Service (AVKService) - G DATA Software AG - C:\Program Files\G DATA InternetSecurity TotalCare\AVK\AVKService.exe
O23 - Service: Gardien d'AVK (AVKWCtl) - G DATA Software AG - C:\Program Files\G DATA InternetSecurity TotalCare\AVK\AVKWCtl.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Pare-feu personnel G DATA (GDFwSvc) - G DATA Software AG - C:\Program Files\G DATA InternetSecurity TotalCare\Firewall\GDFwSvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe

Il y a t-il un moyen de m'en débarasser ?

Merci