Retail game box was purchased and is missing the game key.
If your antivirus software detects a virus in a Blizzard game folder, the detection will most likely be a false positive.
What to do if you have lost access to your Blizzard Data File.
Tools required for opening a Blizzard Data file.
General information about the capabilities of Parental Controls.
What to do if the account of a friend or family member was compromised.
What to do if you receive this error on the mobile Battle.net app
This article explains the process of creating system files