You should go work for one of them call service tech support centres xD
I have had the same issue, did you re-install arma 3 or windows for that fact and are you trying to open Arma 3 using the ALUK Launcher? If this is the case please do the following: Open Arma 3 using steam, run the first...
Maybe it could be an issue with your CPU over heating but if you are getting a new CPU I recommend the AMD - FX-8350 8 core black edition. My friend has it and he says it is good from rendering and such!