WTF!? I'm playing Necrons, just erased IG from the map and each time I got to "Commander" option the game crashes. Tried reinstalling, beating the mission again - same thing!

HELP!!!

To my understanding, it appears to be that Windows 10 changed the way that memory is handled from Win7, which causes errors like this. CTDs after Stronghold victories or when accessing the Commander tab. I don't know why, and to my knowledge there is no fix, nor is there likely to be one.

Damn shame, because the game is pretty good otherwise.

Have you looked here?
https://www.gog.com/forum/warhammer_40000_dawn_of_war/constant_captial_mission_crashing_dark_crusade/page1

My "solution" was simply to refrain from accessing the "Commander" tab ever again...

That kinda sucks

Yeah but at least I could play the game to the end.