Right click in the bottom left hand corner of the desktop. You'll see a menu appear and from choose Administrator command prompt. Type or copy and paste:
DISM /Online /Cleanup-Image /RestoreHealth
Press enter and wait until the scan finishes (patience please)
In the same command prompt window once the above scan finishes type:
sfc /scannow
Press enter and await results.
Now try the app again.
You could also try uninstalling the update which initiates the reservation:
Link Removed
Then re-install it and see if makes a difference.