Hi Deses,
have you tried the troubleshooter?
Link Removed
Almost sounds like your Windows Update service is missing. Errors that end in 0002 and 0005 see below.
ERROR_FILE_NOT_FOUND
2 (0x2)
The system cannot find the file specified.
ERROR_ACCESS_DENIED
5 (0x5)
Access is denied.
You may one to try sfc /scannow if it prompts you for installation media then it may fix the issue.
C:\Windows\system32>sfc /scannow
Iniciando examen en el sistema. Este proceso tardará algún tiempo.
Iniciando la fase de comprobación del examen del sistema.
Se completó la comprobación de 100%.
Protección de recursos de Windows no encontró ninguna infracción
de integridad.
I don't think there is a way to re-install Windows Update.
I would say you are going to need to do a soft Windows install.
DISM /Online /Cleanup-image /RestoreHealth /Source:pathto_install.wim
You may also want to tryThe install.wim or install.esd file should be on the Windows install media under sources. There is an option in the re-install to keep data and applications, it should not affect your data or programs. I'm not sure if it maintains the registry or not. I believe it would if your applications are intact.Code:DISM /Online /Cleanup-image /RestoreHealth /Source:pathto_install.wim