Perhaps you have installed a Windows 10 Update, but the computer failed to restart normally. You attempted to use System Restore but your Restore Point did not work.
To recover from a failed restart and roll back the restore process:
1.Boot the computer into the Windows Recovery Environment by restarting and holding down the Shift key. The environment should be loaded automatically after several failed restarts. 2.In the Windows Recovery Environment, select Troubleshoot > Advanced options > System restore, and then select Undo system restore.
For additional information on troubleshooting System Restore after a Windows 10 Update please see: