Seems to be the same issue I had, mate. Here's everything I did and is worth giving a shot:
- unplug all peripherals
- update windows
- update all drivers (especially graphics card and sound card - try a clean install by removing the previous driver completely and installing from a fresh installer)
- if none of the above work, check what non-essential services and startup programs your computer is running, disable all of them and try to run DCS. Then enable one by one until you find the aggressor.
- one remote possibility is that your user profile is corrupted, so I would try creating a new user profile with admin rights and try running DCS from the new profile before trying anything more serious.
What worked for me was reinstalling the audio drivers, but only worked after the second try. There's a definitely a solution, so don't give up.
Let me know how it goes.