How to fix Battle.net “Not signed into profile after update”

The very first step is to ensure your Internet connection is functioning. You can do this by running a quick test in your network settings to check if it is working or not. If it turns out to be the culprit, restarting your router or modem can help resolve any connection problems. 

If your connection is functioning as it should, there may be server issues on Blizzard's end. To check if this is the case, you can visit Blizzard's official website or social media pages for any updates on server status. If the servers are down, wait until the problem has been resolved before attempting to log in again. It is possible that you may experience lag when playing, however. 

If the server issue isn't the cause of your problem, try restarting the app and/or your PC. Before launching the app after a restart, make sure it has been completely exited out of in the Task Manager. This can be done by pulling up the Task Manager and checking the list of running applications.

If none of these solutions work, contact Blizzard Support for further assistance. Provide as much detail about your situation as possible, and they can investigate what is going wrong. In the majority of cases, it will be tied to server difficulties, in which case the problem should fix itself after the server issues have been resolved.