In those cases, uninstall the game, delete the Blizzard Entertainment folders from both ProgramData and your Documents folder, and perform a clean reinstall.
Locate and delete the and Battle.net folders. Restart the Battle.net launcher and relaunch the game. Preparing game data - Technical Support - SC2 Forums starcraft ii preparing game data
Sometimes the game is "preparing data" but doesn't have the "permission" to actually write that data to your disk. Right-click the icon. Select Run as Administrator . In those cases, uninstall the game, delete the