Close all Blizzard programs. Press Ctrl + Shift + Esc to open .
Look at your Windows taskbar tray and click the (the blue or white cloud). starcraft 2 preparing game data
Modern operating systems and antivirus programs are highly sensitive to applications modifying data in the background. If Windows or a third-party antivirus restricts StarCraft II from reading or writing to your hard drive, the "Preparing Game Data" screen will freeze indefinitely. Run as Administrator Right-click the on your desktop. Select Properties , then navigate to the Compatibility tab. Close all Blizzard programs
Preparing data from scratch is time-consuming. Fortunately, several massive, pre-processed datasets are available: Modern operating systems and antivirus programs are highly
If all else fails, your CASC archive is irreparably corrupted. A standard "Scan and Repair" from Battle.net will just loop. You need a clean slate.
The most effective fix involves forcing both the launcher and the game engine to use the exact same language pack.