Hey there,
Let’s try the following then if you already reset ui:
Try doing an extended power cycle on your system. Turn off all devices including the modem. Wait 30 minutes, turn on the modem, wait 5 minutes, turn on any network devices, wait 2 minutes, turn on your computer and try the game.
In some cases there is a corrupt or misconfigured setting within the router or modem. We cannot say what that might be offhand but the easiest way to resolve these conflicts would be to factory reset the router and/or modem.
You may need to look up your specific model for the steps on how to do this and in some rare cases you may need to have this done by the ISP. Feel free to reach out to them for assistance if necessary.
You can try using a VPN. This can help determine if the issue is routing based. Please note we do not support VPN usage though we do not prohibit its use with most of our games. Some countries around the world do restrict VPN usage so you will want to research these restrictions for your country before attempting to use a VPN.
Many VPNs offer a demo or trial version of their service to allow you test without commitment.
This is not meant to be the solution, just for testing but if it solves the issue and are comfortable using the VPN, you can continue to do so.
Do you have the ability to connect the system to a mobile hotspot?
We do not support this setup for playing but it can provide contrast to your normal connection. If you go this route make sure you are on mobile data and not on your wifi network and if you have a limited data plan, restrict your testing to prevent excessive data usage.
There are online guides for most smartphones on how to do this and most carriers can guide you through the setup process as well.
Do you have the ability to try a different computer on the same network? Or, the ability to try your current computer on a different network? This can help us determine if what you are experiencing is due to an network issue or something specifically with your system itself. Give it a shot and see what happens.
Try running your system in selective startup mode: https://battle.net/support/article/200483
Create a new administrator account: https://battle.net/support/article/34550
Once the account is created, shut down the computer, wait 60 seconds, restart, log into the new profile and try the app/client.
If that doesn’t solve the issue, then I recommend submitting a ticket with an msinfo attached for further investigation. (instructions for collecting that msinfo report will be on the form.)
Click your name at the top right of this page, click support, click contact support.