Overwatch crashes on start

I’ve had a problem with starting up overwatch lately, I click “Play” the icon shows for about 2 seconds before dissapearing

Have you tried the Options -> Scan and Repair option in the menu?
Also maybe the <Documents>\Overwatch\Logs\Overwatch.log file could provide some additional info for you.

Can you post a DxDiag report? If you have any Razer products, we’d suggest looking over the post here.