Hi Ray,
Please mention your OS build number. You can find that by running winver.exe.
If you have the latest cumulative update (OS Build 26200.8246) installed, then you may skip the repair ("Reinstall Now") procedure.
To investigate why the repair installation failed and rolled back, zip the following log files and upload them to OneDrive or GoFile.io and post the link here:
C:\$WINDOWS.~BT\Sources\Panther\setupact.log
C:\$WINDOWS.~BT\Sources\Rollback\setupact.log