Restart the Battle.net app and try launching the game again. 2. Run as Administrator
Re-open Battle.net; it will automatically restart a fresh instance of the agent. 5. Disable Security Software Temporarily starcraft ii preparing game data
Inside, find the folder and delete the Cache directory. Restart the Battle
Try disabling your or third-party antivirus (like Avast or Norton) for 10 minutes. This grants the agent the high-level access it
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
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.
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.