There is a system repair pending which requires reboot to complete
If, when you go to run System File Checker, you receive the following error message, There is a system repair pending which requires reboot to complete, then you may want to try the following.
First, reboot your computer once and let the pending process complete.
But if you continue to receive this message, navigate to C\Windows\WinSxS\ folder, search for a pending.xml file and rename it. You may even delete it. This will delete pending tasks and build a fresh new check.