Salut et merci, alors j'ai fait ce que tu m'as dis mais il y avais quelques messages d'erreur et je n'ai pas reussi à afficher la demo, bref voila le log:
Logfile of HijackThis v1.99.1
Scan saved at 15:53:48, on 3/10/2005
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\Explorer.EXE
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Pinnacle\Pinnacle PCTV\Remote\Remoterm.exe
C:\PROGRA~1\Logitech\MOUSEW~1\SYSTEM\EM_EXEC.EXE
C:\WINDOWS\Mixer.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\System32\fwdmon.exe
C:\WINDOWS\System32\rundll32.exe
C:\Program Files\eDonkey2000\eDonkey2000.exe
C:\Program Files\Save\Save.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Pinnacle\Shared Files\Programs\Scheduler\PCLEScheduler.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\notepad.exe
C:\hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.accoona.com/search_assistant/accoona_search_assistant.jsp?&utm_id=400010&utm_content=leftnav&utm_source=efc&utm_medium=bund&utm_campaign=efc0605
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.accoona.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.google.fr
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.accoona.com/search?q=%s
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - Default URLSearchHook is missing
O2 - BHO: URLLink Class - {4A2AACF3-ADF6-11D5-98A9-00E018981B9E} - C:\Program Files\NewDotNet\newdotnet6_38.dll
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Program Files\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll
O3 - Toolbar: Accoona - {364B6276-C6C1-40B6-A6D7-6C48871FD707} - C:\Program Files\Accoona\atoolbar.dll (file missing)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll
O4 - HKLM\..\Run: [QuickTime Task]