I have rebooted my entire windows 7 after having a virus. The thing is that i have never experienced problems with playing arma 3 before. But now after this complete reinstallation of my computer i cant run ARMA 3.

A error occurs in the arma 3 launcher which says " The version of this file is not compatible with the version of windows you¨re running. Check your computers system to see whethever you need an (32 bit) or (64 bit) version of the program, and then contact the software publisher2"

I have never experienced something like this with Arma 3 before and im wondering how im going to be able to solve this problem!