Help W32.desktophijack et trojan.startpage.M

bonjour tt le monde
SVP pouvez vous m aider? j ai 2 virus sur mon PC
W32.Desktophijack et trojan.StartPage.M
j ai un PC portable HP Omnibook XE3 av un windows XP

et voici le rapport de hijackthis
Logfile of HijackThis v1.99.1
Scan saved at 22:31:10, on 29/07/2005
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2600.0000)

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\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\HPConfig.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\Program Files\Hewlett-Packard\TopToolsWMI\WMIProviders\HPAlertWMI.exe
C:\Program Files\Hewlett-Packard\TopToolsWMI\WMIWDog.exe
C:\WINDOWS\System32\wbem\wmiprvse.exe
C:\WINDOWS\System32\igfxtray.exe
C:\WINDOWS\System32\hkcmd.exe
C:\WINDOWS\essspk.exe
C:\Program Files\Hewlett-Packard\HP Display Settings\hpdisply.exe
C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\PROGRA~1\HPONE-~1\OneTouch.EXE
C:\PROGRA~1\NORTON~1\navapw32.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Hewlett-Packard\TopToolsWMI\HPTrayIcon.exe
C:\WINDOWS\System32\intell32.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Yahoo!\Messenger\ypager.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\a2\a2guard.exe
C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
C:\Program Files\Microsoft Encarta\Collection Encarta 2005\EDICT.EXE
C:\WINDOWS\System32\wuauclt.exe
C:\Program Files\Hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\DOCUME~2\SOUMAYA\LOCALS~1\Temp\se.dll/space.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://fr.yahoo.com/?.home=msgr
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\DOCUME~2\SOUMAYA\LOCALS~1\Temp\se.dll/space.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fourni par Menara
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: DownloadRedirect Class - {00000000-6CB0-410C-8C3D-8FA8D2011D0A} - C:\Program Files\iMesh\iMesh5\iMeshBHO.dll
O2 - BHO: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_6_2_0.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {511F9316-771B-4953-A268-1C36DA667FE9} - (no file)
O2 - BHO: iMeshBar BHO - {5345A7A1-805A-4923-B505-86B2FEBA3FE0} - C:\Program Files\iMeshBar\bar\1.bin\IMESHBAR.DLL
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O2 - BHO: CNavExtBho Class - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O2 - BHO: (no name) - {BED48E35-7F07-4EB5-A662-B0E985C72CCA} - C:\WINDOWS\System32\mhbg.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: iMeshBar - {5345A7A9-805A-4923-B505-86B2FEBA3FE0} - C:\Program Files\iMeshBar\bar\1.bin\IMESHBAR.DLL
O3 - Toolbar: Yahoo! Barre d'outils - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_6_2_0.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [EssSpkPhone] essspk.exe
O4 - HKLM\..\Run: [Paramètres d'affichage HP] C:\Program Files\Hewlett-Packard\HP Display Settings\hpdisply.exe /s
O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [CP4HPOT] C:\PROGRA~1\HPONE-~1\OneTouch.EXE
O4 - HKLM\..\Run: [NAV Agent] C:\PROGRA~1\NORTON~1\navapw32.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [HP Tray Icon WMI] C:\Program Files\Hewlett-Packard\TopToolsWMI\HPTrayIcon.exe
O4 - HKLM\..\Run: [intell32.exe] C:\WINDOWS\System32\intell32.exe
O4 - HKLM\..\Run: [sp] rundll32 C:\DOCUME~2\SOUMAYA\LOCALS~1\Temp\se.dll,DllInstall
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Yahoo! Pager] C:\Program Files\Yahoo!\Messenger\ypager.exe -quiet
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [a-squared] "C:\Program Files\a2\a2guard.exe"
O4 - Global Startup: DSLMON.lnk = C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Pages liées - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Program Files\Yahoo!\Messenger\yhexbmesfr.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\Program Files\Yahoo!\Messenger\yhexbmesfr.dll
O9 - Extra button: Organise-notes - {9455301C-CF6B-11D3-A266-00C04F689C50} - C:\Program Files\Fichiers communs\Microsoft Shared\Encarta Researcher\EROPROJ.DLL
O9 - Extra button: Abonnés - {4A7C40E7-930A-46BB-90B4-D06BA9B58A93} - http://abonne.menara.ma (file missing) (HKCU)
O14 - IERESET.INF: START_PAGE_URL=http://www.menara.ma
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O18 - Filter: text/html - {30EBC4C6-824F-4DAB-88E4-5F9E9B97C8C9} - C:\WINDOWS\System32\mhbg.dll
O18 - Filter: text/plain - {30EBC4C6-824F-4DAB-88E4-5F9E9B97C8C9} - C:\WINDOWS\System32\mhbg.dll
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O21 - SSODL: DCOM Server - {2C1CD3D7-86AC-4068-93BC-A02304BB8C34} - C:\WINDOWS\System32\dcom_7.dll
O23 - Service: HPAlertWMI - Hewlett-Packard Co. - C:\Program Files\Hewlett-Packard\TopToolsWMI\WMIProviders\HPAlertWMI.exe
O23 - Service: HP Configuration Service (HPConfig) - Hewlett-Packard - C:\WINDOWS\System32\HPConfig.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe

et merci d'avance.