salut merci pour ta réponse voila le rapport hijackthis :
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:19:04, on 24/07/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\services.exe
C:\WINDOWS\VM303_STI.EXE
C:\WINDOWS\System32\Rundll32.exe
C:\Program Files\Internet Explorer\iexplore.exe
D:\Free Download Manager\FUM\fumoei.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\WINDOWS\system32\WgaTray.exe
D:\FREEDO~1\fdm.exe
C:\Program Files\MSN Messenger\usnsvc.exe
D:\Mozilla Firefox\firefox.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Documents and Settings\tazebama.dl_
C:\Documents and Settings\mohamed\Bureau\Skype.exe
D:\MediaCoder\codecs\MPUI.exe
D:\MediaCoder\codecs\mplayer.exe
C:\Program Files\Ares\Ares.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = C:\Program Files\Copernic Agent\Web\SearchBar.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://fr.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://fr.rd.yahoo.com/customize/ie/defaults/sp/msgr8/*http://fr.search.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://fr.rd.yahoo.com/customize/ie/defaults/su/msgr8/*http://fr.search.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
F2 - REG:system.ini: Shell=Explorer.exe C:\WINDOWS\system32\fservice.exe
O2 - BHO: HelperObject Class - {00C6482D-C502-44C8-8409-FCE54AD9C208} - C:\Program Files\TechSmith\SnagIt 8\SnagItBHO.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: superiorads browser optimizer - {2870f3ae-1493-925f-53f2-c4124b0b059d} - C:\WINDOWS\system32\wegckonebbodqxki.dll
O2 - BHO: (no name) - {4E7BD74F-2B8D-469E-CCB0-B130EEDBE97C} - (no file)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: superiorads browser optimizer - {8E015787-B1E3-404a-95DE-3E71E1FA0305} - C:\WINDOWS\system32\spads.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: dcads - {9ac1f717-7914-c2dd-d436-89a3c5953f11} - C:\WINDOWS\system32\nsjE.dll
O2 - BHO: dcads - {C7C90A5E-BE0A-44DD-83D2-1BE138460BAC} - C:\WINDOWS\system32\nsg1A.dll
O2 - BHO: FDMIECookiesBHO Class - {CC59E0F9-7E43-44FA-9FAA-8377850BF205} - D:\Free Download Manager\iefdm2.dll
O3 - Toolbar: (no name) - {4E7BD74F-2B8D-469E-CCB0-B130EEDBE97C} - (no file)
O3 - Toolbar: Webshots Toolbar - {C17590D2-ECB4-4b15-8820-F58798DCC118} - C:\Program Files\Webshots\WSToolbar4IE.dll
O3 - Toolbar: SnagIt - {8FF5E183-ABDE-46EB-B09E-D2AAB95CABE3} - C:\Program Files\TechSmith\SnagIt 8\SnagItIEAddin.dll
O4 - HKLM\..\Run: [BigDog303] C:\WINDOWS\VM303_STI.EXE VIMICRO USB PC Camera (ZC0301PLH)
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [{8375fe3d-c1bd-2d66-deba-5215e2a98157}] C:\WINDOWS\System32\Rundll32.exe "C:\WINDOWS\system32\wegckonebbodqxki.dll" DllStart
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "D:\adobe\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Free Uploader Oe Integration] D:\Free Download Manager\FUM\fumoei.exe
O4 - HKCU\..\Run: [ares] "C:\Program Files\Ares\Ares.exe" -h
O4 - HKLM\..\Policies\Explorer\Run: [DirectX For Microsoft® Windows] C:\WINDOWS\system32\fservice.exe
O8 - Extra context menu item: &Webshots Photo Search - res://C:\Program Files\Webshots\WSToolbar4IE.dll/MENUSEARCH.HTM
O8 - Extra context menu item: Analyser avec LeechGet - file://C:\Program Files\LeechGet 2007\\Parser.html
O8 - Extra context menu item: Tout télécharger avec Free Download Manager - file://D:\Free Download Manager\dlall.htm
O8 - Extra context menu item: Télécharger avec Free Download Manager - file://D:\Free Download Manager\dllink.htm
O8 - Extra context menu item: Télécharger en utilisant l'assistant LeechGet - file://C:\Program Files\LeechGet 2007\\Wizard.html
O8 - Extra context menu item: Télécharger en utilisant LeechGet - file://C:\Program Files\LeechGet 2007\\AddUrl.html
O8 - Extra context menu item: Télécharger la sélection avec Free Download Manager - file://D:\Free Download Manager\dlselected.htm
O8 - Extra context menu item: Télécharger la vidéo avec Free Download Manager - file://D:\Free Download Manager\dlfvideo.htm
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe (file missing)
O9 - Extra button: Upload - {FD4E2FF8-973C-4A19-89BD-8E86B3CFCFE1} - D:\Free Download Manager\FUM\fumiebtn.dll
O16 - DPF: Yahoo! Pool 2 - http://origin.games.yahoo.net/games/clients/y/poti_x.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{327C305E-6A82-4F49-9D34-E18700AE82BC}: NameServer = 85.255.116.40 85.255.112.101
O17 - HKLM\System\CCS\Services\Tcpip\..\{6A0E5345-D8E3-4C5D-8EFA-F3A20D19C093}: NameServer = 85.255.116.40,85.255.112.101
O17 - HKLM\System\CCS\Services\Tcpip\..\{7E9C60B3-F26A-4E90-B1FA-F06CA990CFC5}: NameServer = 85.255.116.40,85.255.112.101
O17 - HKLM\System\CCS\Services\Tcpip\..\{F794894E-17B0-4395-8EC5-6FF75834F2EA}: NameServer = 85.255.116.40,85.255.112.101
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 85.255.116.40 85.255.112.101
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: NameServer = 85.255.116.40 85.255.112.101
O17 - HKLM\System\CS3\Services\Tcpip\Parameters: NameServer = 85.255.116.40 85.255.112.101
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 85.255.116.40 85.255.112.101
O23 - Service: Ares Chatroom server (AresChatServer) - Ares Development Group - C:\Program Files\Ares\chatServer.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: getPlus(R) Helper - NOS Microsystems Ltd. - C:\Program Files\NOS\bin\getPlus_HelperSvc.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe

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End of file - 7458 bytes


et j'ai fait ce que tu ma demandé