Troubleshooting steps for Diablo II (2000) error "Your CD Key is currently being used by: Claimed on Battle.net."
Error WOW51900323 when trying to log in to World of Warcraft or when zoning into a new area
Standalone patches are downloaded outside of the game launcher or the Battle.net desktop app.
We couldn't process your purchase because of your Parental Controls settings.
Your login session has expired. Please log in again.
We couldn't process your purchase because of your Parental Controls settings.
Your installation could not be started. Please try again.