[Question] Red Orchestra 2 problems with win 8.1

Hello guys i need some help, with windows 7 red orchestra 2 runs fine but with windows 8.1 have freezes, stuttering mainly in maps rising storm this is the unique game that i have problems in windows 8.1, I do not want to have to switch to windows 7 to play the RO2 again, because all the other games I have run much better on windows 8.1, someone have one solution for this:confused:



PS: Sorry for my bad english im brazillian :P