Ayuda. no puedo activar windows update. digamen si hay algun problema en este registr

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:56:09 PM, on 5/16/2011
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18904)
Boot mode: Normal

Running processes:
C:\Program Files\AVAST Software\Avast\AvastUI.exe
C:\Program Files (x86)\Windows Live\Messenger\msnmsgr.exe
C:\Program Files (x86)\Windows Live\Contacts\wlcomm.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Program Files (x86)\Mozilla Firefox\plugin-container.exe
C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Windows\SysWOW64\Macromed\Flash\FlashUtil10l_Ac tiveX.exe
C:\Program Files (x86)\Windows Live\Messenger\msnmsgr.exe
C:\Program Files (x86)\Mozilla Firefox\plugin-container.exe
C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe
C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe
C:\Program Files (x86)\WinRAR\WinRAR.exe
C:\Program Files (x86)\Trend Micro\HijackThis\HijackThis.exe

O1 - Hosts: ::1 localhost
O2 - BHO: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O3 - Toolbar: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O4 - HKLM\..\Run: [avast] "C:\Program Files\AVAST Software\Avast\avastUI.exe" /nogui
O4 - HKUS\S-1-5-20\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'NETWORK SERVICE')
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Unknown owner - (no file)
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: ASP.NET State Service (aspnet_state) - Unknown owner - C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspn et_state.exe (file missing)
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: avast! Firewall - AVAST Software - C:\Program Files\AVAST Software\Avast\afwServ.exe
O23 - Service: Microsoft .NET Framework NGEN v2.0.50727_X86 (clr_optimization_v2.0.50727_32) - Unknown owner - (no file)
O23 - Service: Microsoft .NET Framework NGEN v2.0.50727_X64 (clr_optimization_v2.0.50727_64) - Unknown owner - (no file)
O23 - Service: @dfsrres.dll,-101 (DFSR) - Unknown owner - C:\Windows\system32\DFSR.exe (file missing)
O23 - Service: @%SystemRoot%\ehome\ehrecvr.exe,-101 (ehRecvr) - Unknown owner - (no file)
O23 - Service: @%SystemRoot%\ehome\ehsched.exe,-101 (ehSched) - Unknown owner - (no file)
O23 - Service: Google Update Service (gupdate1c9b8bdfa74e3c0) (gupdate1c9b8bdfa74e3c0) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: Google Update Service (gupdatem) (gupdatem) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: @%systemroot%\Microsoft.NET\Framework64\v3.0\Windo ws Communication Foundation\ServiceModelInstallRC.dll,-8193 (idsvc) - Macrovision Corporation - (no file)
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Language Engineering Corporation, LLC - (no file)
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: @%systemroot%\sysWow64\perfhost.exe,-2 (PerfHost) - Unknown owner - (no file)
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: QuickPlay Background Capture Service (QBCS) (QPCapSvc) - Unknown owner - (no file)
O23 - Service: QuickPlay Task Scheduler (QTS) (QPSched) - Unknown owner - (no file)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\SLsvc.exe,-101 (slsvc) - Unknown owner - C:\Windows\system32\SLsvc.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\servicing\TrustedInstaller.exe,-100 (TrustedInstaller) - Unknown owner - C:\Windows\servicing\TrustedInstaller.exe (file missing)
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files (x86)\TuneUp Utilities 2011\TuneUpUtilitiesService64.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - (no file)

--
End of file - 5314 bytes

Realiza los siguientes pasos y nos pasas los resultados:

1º Actualiza tu sistema Aquí (Utiliza el I. Explorer)

2º Borra todas las cookies y limpia el registro con CCleaner

3º Vete a Inicio- Panel de Control--> Java (si usas Java) y elimina todos los archivos temporales.

4º Borrar archivos temporales--> Desde Inicio, Ejecutar, escribe %TEMP%, pulsa Enter y elimina todo el contenido.

5º Pásale el Malwarebytes Antimalware. (Actualizalo, y al acabar el Scaneo elije la opcion eliminar, despues guarda el report y lo pegas) Si tienes alguna duda, aquí tienes un Manual de Malwarebytes Antimalware

6º Ademas, haz un :

Scan on line:

Free Online Virus Scan - BitDefender Online Scanner
Debes usar el Internet Explorer y aceptar los active x
Le pones que elimine lo que te detecte.

Nos copias ese reporte, el del Malwarebytes Antimalware y un nuevo log del hijackthis.

Saludos y bienvenido al foro.