Hi Jason,
A compatibility issue is one of the possible reasons why you are not able to play Command and Conquer on your Windows 10 device. To help you check if the game will work on a Windows 10 computer, we suggest that you visit the link below:
How to find out if a game will work on your Windows 10 device
For additional information, we recommend that you check out this link.
Should you need further assistance, feel free to post anytime.