If these steps fail, you may need to run the Scan and Repair tool from the Battle.net options menu or perform a full reinstall of the Battle.net Desktop App.
As a , it’s part of Blizzard’s integrity check system – designed to prevent crashes from bad data. It isn’t user-toggleable, but you can see its progress via Task Manager disk usage. If you need to disable or skip it → not possible (removing it would risk corruption crashes). starcraft 2 preparing game data verified
Are you seeing a specific alongside the "Preparing Game Data" message? Preparing game data - Technical Support - SC2 Forums If these steps fail, you may need to