Hello!
I have noticed a few people have posted about this issue, with little resolve, so I thought I would also revive the topic.
I pulled out my old Warcraft 2 cd a few weeks ago, installed it on my computer with Windows 10.
Have had no issues, until I came on the #12 orc campaign for Tides of Darkness.
It goes straight to dark with no responses from keys until I just switch out of the program.
I am playing from the regular program source, from a shortcut on my desktop.
I have installed the ddraw patch to see if it would help, but it has not.
I am about to restart my computer to see if it will be of any help. If it is, I'll instantly respond with a fixed, but if no response, then the issue is still happening.