I had the same problem with Windows 7 Pro. The update was probably KB3086255 and the solution to make AoM work again was described in MS15-097 (Microsoft Security Bulletin 15-097). I think I posted the links in this thread already. :)
The device driver secdrv.sys was determined to be a security risk, so disabled by MS. To temporarily enable it for the game, you'll use the DOS command prompt. You can do a 'search' for the command prompt. When you find it, right click on it to use as
admin, or as an 'elevated command prompt.' You'll get the black command prompt window with white text. You should see something like 'c:\windows\system32>' where you type 'sc start secdrv' and enter to manually start the driver again.
When you are through playing, you can disable it again, for security, using the elevated command prompt 'sc config secdrv start= disabled' and enter.
I also found the only way to start my AoM program is to right click on it in the program list or shortcut and select run as admin from the drop down menu.
I love this game so much I rolled back Windows 10, which would not allow me to play it. I understand the secdrv.sys driver does not come with Windows 10.