Fix Error 0x800704b3, Windows cannot access, The network path was either typed incorrectly, does not exist, or the network provider is not currently available.

Windows cannot access this folder. Make sure you typed the file name correctly and that you have permission to access the folder. Details: A connection with the server could not be established.

“Windows cannot access the specified device” is one of the many performance issues that League of Legends is facing after the introduction of Vanguard with patch 14.9.