Windows Resource Protection could not start the repair service is quite a normal error to receive when attempting to start a System File Checker scan. The problem is caused by trustedinstaller service not running properly.
[symple_box color=”yellow” fade_in=”false” float=”center” text_align=”left” width=””] One or more steps require the use of Administration rights on the system. Please sign-in in with an Administrator before continuing.[/symple_box]
Resolving this problem
Method 1: Using Services.msc
1. Press the Windows + R key on your keyboard at the same time and then type services.msc and hit enter.
2. Then find Windows Modules Installer or TrustedInstaller and doubleclick it.
![TrustedInstaller](http://windowsinstructed.com.www603.your-server.de.www603.your-server.de/wp-content/uploads/2014/10/2014-10-28_20-37-45-300x220.png)
3. Now click the Start button.
Then try to run SFC again and see if it now works.
Method 2: Using Elevated Command Prompt
1. Start an Elevated Command Prompt (Run as Admin)
2. Enter the following command:
net start trustedinstaller
3. Hit enter.
Now try to run SFC again and see if it now works.