Open the and navigate to the StarCraft II tab. Click the Options (gear icon) next to the Play button. Select Scan and Repair .

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.

Inside, find the folder and delete the Cache directory.

The Agent.exe is the background process that handles all Blizzard installs and updates. If it’s frozen, your game data will stay in "preparation" indefinitely. Open (Ctrl+Shift+Esc). Look for Battle.net Update Agent or Agent.exe . Right-click and select End Task .

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.

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 .

If the cache isn't the issue, one of your actual game files might be "shredded." Battle.net has a built-in mechanic to find and replace these.

The most frequent cause of this hang is a corrupted . Deleting it forces the Battle.net agent to reach out to the servers and rebuild the necessary bridge to your game data.