Avast détecte 5 "cheval de troie"

Bonjour,

Que dois je faire?
Merci de votre réponse
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 23:35:24, on 28/10/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

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:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Intel\IntelDH\CCU\AlertService.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\ehome\ehtray.exe
C:\WINDOWS\eHome\ehRecvr.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Intel\IntelDH\CCU\CCU_TrayIcon.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\Iaantmon.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\Iaanotif.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\system32\ctfmon.exe
C:\documents and settings\utilisateur\local settings\application data\cqqug.exe
C:\Program Files\Intel\IntelDH\CCU\CCU_Engine.exe
C:\PROGRA~1\COMMON~1\X10\Common\x10nets.exe
C:\Program Files\Intel\IntelDH\Intel(R) Quick Resume Technology Drivers\Elservice.exe
C:\Program Files\Intel\IntelDH\Intel Media Server\Media Server\bin\ISSM.exe
C:\Program Files\Intel\IntelDH\Intel Media Server\Shells\MCLServiceATL.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\rsvp.exe
C:\WINDOWS\eHome\ehmsas.exe

Configuration: Windows XP
Firefox 3.0.3