Windows couldn't connect to the windows all-user install agent service

Many of the Windows 8 user are facing problem of error displaying on start-up-

           "Windows couldn't connect to the windows all user install agent service. Please consult
             your System Administrator...."

This problem is very often preventing users form successfully logging on the computer, slow loading of Metro apps or even desktop application.

To fix this, you need to log on as an Administrator. Once logged on, resolving of this issue is easier.

Open a command prompt with Administrative Privileges(search cmd on Start Screen, right-click on Command Prompt tile and Select Run as Administrator from the App Bar). Now execute the following commands:

   sc config AllUserInstallAgent start =  demand(Press Enter)
   net start AllUserInstallAgent(Press Enter)
   sfc /scannow(Press Enter)

The first two commands change the start-up type of the required problem service, and the third will check for other corrupt file issues in your windows installation. It will take a good time to complete, so be relaxed.

The errors should be resolved. It works for me. Remember to restart the computer after completion.