Then you should be able to run the game from the disc, as long as you use
this fix.
Normally discussing No CD cracks is against our rules, but since it's a viable workaround for games that use the old copy protection method that's no longer supported in Windows 10 (and was disabled by default in an update for Windows 7 and 8.1), we let it slide as long as people are using it with a legal copy of the game.
The issue you're describing was addressed by the official patch (for most people, anyway), so I'd recommend restoring the original exe file, installing the official patch, and using the above fix to run it from the disc.