This grants the agent the high-level access it needs to modify game files during the preparation phase. 3. Use the "Scan and Repair" Tool
Re-open Battle.net; it will automatically restart a fresh instance of the agent. 5. Disable Security Software Temporarily
If the game starts immediately, you’ll need to add an for StarCraft II and Battle.net in your security settings. Summary Checklist Potential Cause Corrupt Cache Delete the Battle.net Cache folder in %ProgramData% . Permissions Run Battle.net as an Administrator. Broken Files Use the "Scan and Repair" tool in the app options. Network Block Temporarily disable firewall or VPN. starcraft ii preparing game data
Inside, find the folder and delete the Cache directory.
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. This grants the agent the high-level access it
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.
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. Permissions Run Battle
Wait for the process to finish. It may take 5–10 minutes depending on your hard drive speed. 4. Check for Background "Agent" Issues
Restart the Battle.net app and try launching the game again. 2. Run as Administrator
Open the and navigate to the StarCraft II tab. Click the Options (gear icon) next to the Play button. Select Scan and Repair .