How can I resume installing Windows after a power outage?

Episode 1364 (1:34:14)

Frank from Huntington Beach, CA
Windows 10 Start Menu

Frank was in the middle of upgrading to Windows 10 on his laptop when the power went out right in the middle of it. Leo says if Frank is lucky, he can roll it back. Leo says to try and start the update process over again. What Leo recommends is to try the "Repair" option in the Windows Update. He should save the Windows install onto a USB key and boot to it. Then select "Repair" when it runs.