ac186bab57 Powered by Mediawiki. For answers to some common questions about installing Windows8.1, see Update to Windows 8.1: FAQ. Need more help? . How to install Microsoft Windows 7 on the Windows 8-based computer: Turn on the computer to start Windows 8. Don't do this if you are on your company laptop and are afraid of the IT police. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Select Reboot to restart the computer.