- No didnt install into program files.
- UAC is disabled
- I have Gold and I downloaded the Kingdoms 1.5 UK patch (I believe it is the correct region)

I have done what you have explained above and i am able to install the kingdoms 1.5 patch but when i go to play a Kingdoms expansion it says, error, i have the wrong disc (and i don't, i have tried both disks. Alot of pple seem to have this issue and i cant figure out why it is happening).

Its weird