From my experience (numerous attempts) CC5 with Stalingrad mod won't run on Win 10. The case was most probably graphic problems: I've tried couple of tricks suggested above, but none of them worked. I got black screen after 1 or 2 missions or the game just froze. Moreover, there is no possibility to play CC5 in windowed option. As someone posted before, even official statement from MatrixGames says that it is not possible (yet?) to run CC5 on Win 10. So, keep a (virtual) machine with Win7 in case you want to play CC5 with mods.
In August of 2004, Zappi, Homba, Bambam887, RedScorpion and MOOXE all pitched
in to create this Close Combat site. I would to thank all the people who have visited
and found this site to thier liking. I hope you had time to check out some
of the great Close Combat mods and our forums. I'd also like to thank
all the members of our volunteer staff that have helped over
the years, and all our users that contributed to this site!