Shut down your PC and unplug your router for 60 seconds. Network hiccups often cause the data synchronization to loop indefinitely.
Restart the Battle.net app and launch the game. (Note: This will not delete your game installation). Phase 3: Repairing Game Files sc2 preparing game data
Blizzard patches the game every few months. A "Roach" in Patch 4.8 has 145 HP. In Patch 5.0, it has 145 HP but different armor scaling. Shut down your PC and unplug your router for 60 seconds
Clone sc2reader and parse your most recent ladder loss. You will learn more about your mistakes from the data than you ever will from the replay. (Note: This will not delete your game installation)
If this process gets stuck, it usually means there is a communication breakdown between your PC and the Blizzard servers, or your local cache has become corrupted. Phase 1: The Quick Fixes
Corrupted temporary files are the #1 cause of the "Preparing Game Data" loop. Deleting the Blizzard Cache folder forces the launcher to redownload fresh configuration files. Close all Blizzard programs (Battle.net, SC2). Press to open the Run command. Type %ProgramData% and hit Enter. Locate the Blizzard Entertainment folder. Right-click it and select Delete .