Frayed_32: Yes it is a bit buggy but it's a work in progress. I found the best version that matches original Warcraft 2 the closest was Wargus 2.1. Google that and you can simply download and install it.
The only issue with 2.1 is the resolutions are ancient ones and don't go up to 1020x1080. I have the sourcecode for it but need to get the dependencies to compile it on linux for win32.
I am still working out how to.
But the A.I works great and the game feels genuine in 2.1.
But what exactly became buggy in 2.4.2 after 2.4.1? I tried 2.4.2, I got the problem that it unpacks war2 data to app data instead of current directory. Not sure if that's a bug or feature.
Looks like there's not such behavior in 2.3.
Version 2.1 is too old release as for me. Not sure if it's better than 2.4.x though.
Anyway wargus became much better and much more stable than 10 years ago. But some random crashes still happens from time to time.