Restart the Battle.net app and try launching the game again. 2. Run as Administrator
Antivirus programs and firewalls can sometimes flag the "Preparing Game Data" process as suspicious because it involves a background agent downloading and moving files rapidly. starcraft ii preparing game data
Troubleshooting "Preparing Game Data" in StarCraft II If you are stuck staring at a progress bar labeled in StarCraft II , you aren't alone. This is a common hang-up where the Blizzard Battle.net agent struggles to index or patch the game files before launching. Usually, it’s a simple communication breakdown between the app and your hard drive. Restart the Battle
If you are encountering a pop-up titled "Preparing Game Data" that downloads 100MB–1GB every time you launch the game, this is a known bug often caused by language mismatches corrupted cache files Blizzard Forums Step 1: Sync Launcher and Game Languages Troubleshooting "Preparing Game Data" in StarCraft II If