I'm assuming the Origin installer doesn't ask you for a serial? So they probably have a master serial key for all installations of Generals, hence the issue.
I suggest finding a keygen or some valid serial keys online, and changing the installed serial key via the registry.
https://www.youtube.com/watch?v=1ucmezZ1Zrs
Change both Generals and ZH keys so they're different for all players, then try and play. Let me know how that goes.
I tried this too and it still doesn't work... We even tried using a we even tried using a wireless LAN not connected to the internet. So same issue: 2 diff origin accounts, 2 diff computers, 2 diff installs, windows 10 (which might be the problem in and if itself)
No solution ?
