Instructions
Insert the "Combat Flight Simulator" game disc into the first computer. This will prompt the Install Wizard.
Follow the onscreen instructions; select a language, agree to Terms and Conditions, choose a destination folder for the game and enter the product key that is located on the Microsoft sticker on the box. If you purchased the game as a download, the product key will be in the confirmation of purchase email. For most users it is advisable to stick to the default installation settings as these have been recommended by the game developers to enhance the gaming experience.
Click "Finish" to complete the installation process on the first computer. You will not be required to insert the game disc to play the game in future.
Repeat Steps 1-3 on the second computer. You will now be able to play "Combat Flight Simulator" on both computers.