Error BLZBNTAGT00000840

I have played starcraft remastered a few months ago all fine. Now I need to “update” it but whenever I try to it gives me the error code BLZBNTAGT00000840. I’ve went on YouTube I’ve investigated administrator stuff ive uninstalled starcraft remastered I’ve run the repair tool nothing works. I havent uninstalled and reinstalled battle net because if the other stuff isn’t working it probably wont and i dont want to risk losing all my progress on all the games on battle net. Pls help me i want to play starcraft.

I would recommend you follow all the steps in this Support Article.

well you see im not going to mess around with security systems and will uninstalling battle net lose any progress on any games

Uninstalling doesn’t affect your games or your progress as that is tied to your Account.