1. Navigate to Settings
Select “Update & security”
Click Recovery in the left pane.
Click Get started under Reset this PC.
Click either “Keep my files” or “Remove everything,
Select “Just remove my files” or “Remove files and clean the drive”
Click Reset windows when prompted.
Click Continue when prompted.
2. You can also try downloading an ISO file of Windows 10 install. Mount the ISO file in Windows, which will create a new drive letter. Run setup.exe to either upgrade Windows 10, or to repair Windows, if the ISO is the same version as you have now.
You can create an ISO file by running the Media Creation Tool.
