I installed C&C 3 on my new pc (with windows 10. I hate windows 10) and it would get stuck. But if you just wait long enough, it wil get pass that point. Just wait.
And someone must go tell the CEO of Microsoft to stop making (and then force you to use it) really crappy stuff like windows 10. Windows 10 messed up all 'old' games like C&C Generals and such.