game worked fine but now I see Stronghold.EXE stop working and shuts down. Help Please

You're probably going to want to post in the game-specific subforum. Depending on which Stronghold game you mean, that should either be

https://www.gog.com/forum/dd_stronghold_kingdom_simulator#1466399240
or
https://www.gog.com/forum/stronghold_series#1472217686

I don't know how to help you, but next time title your thead as a question. A lot more people will look at a question and many here like to be helpful. Good luck. :)
EDIT: ninja'd