Can you try removing the following folder:
C:\Documents and Settings\All Users\Application Data\Battle.net
Once here, right click on the Agent folder and select Rename. You can then rename the folder to Agent.Temp to ensure that it is not recognised by the game the next time it launches.
( Application data is a secret file ) In total commander = Settings = u must enable the hidden folders , secret files !
I HOPE I HELPED TO ALL BROS !!!!!!!!