Hi, I’m a volunteer here on the forum. Just to set some expectations: Blizzard doesn’t offer official support for system lockups/freezing because they are not a function of the Overwatch client, and only your operating system has access to functions like this. Instead, they indicate a configuration, driver, or hardware issue with your system.
In this case, I recommend looking at the timeout error being caused by your GPU (error 116). Your specific GPU has an issue with its driver software, which has been previously discussed here:
Perhaps there are some tips to resolve this for you in the thread.
You can also read more about this error on Microsoft’s site here: