Windows 10: While on the screen where the error appears, press Shift+F10 to bring up the command prompt. Type CD x:\windows\system32\oobe (with x being the drive letter where Windows is installed, for example c:\windows\system32\oobe)and hit Enter. Type msoobe and hit Enter. You may then be prompted to create an account name and password, and set the time and date. Click Finish when done. NOTE: If this is a retail version of Windows 10, you may also be prompted to enter a product key for Windows 10. Enter the product key and click Finish. The installation process should then complete and allow the computer to boot into Windows.