Go ahead and read this reddit post about the same issue: / error_code_0xc0000005_fix
Make sure your computer is up to date and that means checking any:
Windows Update
Graphic/Video Card Drivers
Run the command: sfc /scannow
Updated the BIOS on your motherboard and download all additional utilities!
Restart your computer then delete any duplicated cold war files!
Along with that delete any cache files for battle.net / Blizzard Entertainment