Starcraft 2 Preparing Game Data Exclusive [repack] -

This is the number one cause. Windows Defender sees the constant reading/writing of the SC2Data files during the "Preparing" phase as suspicious activity. It steps in to scan the file, locking it.

Alternatively, changing both to and restarting has successfully forced the data to sync for many users. starcraft 2 preparing game data exclusive

: The error is most common for players using languages other than English, as the client may struggle to verify local language packs. Proven Fixes for StarCraft II Game Data Loops This is the number one cause

This often skips the data check, though you will have to log in manually in-game. locking it. Alternatively