For further resolution with the error Windows Resource Protection could not start the repair service, we suggest that you follow the steps below:
- Select Start, and type CMD.
- Right-click Command Prompt; then, choose Run as administrator.
- If prompted, enter a username and password that grants admin rights to the computer.
- Type sc config trustedinstaller start= auto; then, press Enter. You should get a SUCCESS message.
- Next, type net start trustedinstaller; then, press Enter. You should receive a message that the service was started.
- Try the sfc /scannow command again.
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