Virus About:blank

salut à vous tous,
dites, j'ai été victime d'about:blank qui affiche à ts les coups sa page de démarrage sur mon IE. Après avoirs lancé HIJACthis, voici mon rapport. Quelle est la nouvelle étape. Prière de m'aider svp...;

Logfile of HijackThis v1.99.1
Scan saved at 09:23:19, on 24/08/2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\Program Files\Microsoft AntiSpyware\gcasServ.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Microsoft Firewall Client\ISATRAY.EXE
C:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
C:\WINDOWS\system32\wuauclt.exe
C:\DOCUME~1\cyoundje\LOCALS~1\Temp\Répertoire temporaire 4 pour hijackthis.zip\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\DOCUME~1\cyoundje\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,Search Bar = res://C:\DOCUME~1\cyoundje\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\Windows\CurrentVersion\Internet Settings,ProxyServer = 192.168.100.1:8080
O2 - BHO: (no name) - {E1DE34EF-AEB9-4833-BFC7-321D32A7ECB3} - C:\WINDOWS\System32\meah.dll
O4 - HKLM\..\Run: [DeviceDiscovery] C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
O4 - HKLM\..\Run: [gcasServ] "C:\Program Files\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [sp] rundll32 C:\DOCUME~1\cyoundje\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: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - Global Startup: Analyseur de connectivité de client de pare-feu.LNK = C:\Program Files\Microsoft Firewall Client\ISATRAY.EXE
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
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://companyweb
O16 - DPF: {1754A1BA-A1DF-4F10-B199-AA55AA1A120F} (InstallerBehaviorFactory Class) - https://signup.msn.com/pages/MsnInstC.cab
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://us.dl1.yimg.com/download.yahoo.com/dl/yinst/yinst_current.cab
O16 - DPF: {485D813E-EE26-4DF8-9FAF-DEDF2885306E} (NSHelp Class) - http://bubinga/connectcomputer/nshelp.dll
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = minef.local
O17 - HKLM\Software\..\Telephony: DomainName = minef.local
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = minef.local
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: Domain = minef.local
O18 - Filter: text/html - {48FBDCE1-0B89-459F-8C39-F80B7DF34DB8} - C:\WINDOWS\System32\meah.dll
O18 - Filter: text/plain - {48FBDCE1-0B89-459F-8C39-F80B7DF34DB8} - C:\WINDOWS\System32\meah.dll
O20 - Winlogon Notify: igfxcui - igfxsrvc.dll (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe