server closed due to unexpected error every few overwatch matches

if you're already wired and the stats look clean, try a different region on the battle.net launcher before your next match (the globe icon). a bad route to one data centre can cause exactly this and switching sorted it for a couple of people i play with.

That one is almost always connection drops rather than the game itself. Turn on the network stats overlay (ctrl+shift+n on pc) and watch for packet loss before it kicks you. If you see spikes: - go wired if you're on wifi - restart the router, and close anything uploading in the background - if you use a vpn, try a match without it If the overlay stays clean right up to the disconnect, run the scan and repair in the battle.net app, a damaged file can throw the same message.