Make sure that your Graphics Drivers and Programs are still correct versions mine did similar thing the update had something to do with a Driver that deals with visuals on multiple screens after update the App used to control my graphic settings which is Amd Radeon software had changed versions never got notification that a this change took place which when I tried to play a game, the game would start and then crash I just did a reinstall of Graphics card drivers and fixed my issue not sure if this is the same case for you but something to check.
Gumbie's post in DCS stops responding/crashes when joining MP game after Windows update was marked as the answer