A known legacy issue with the Blizzard downloader involves Windows' LAN settings. Search for "Internet Options" in your Windows Start menu. Go to the tab and click LAN settings .
Note: This may require you to log in manually within the game client. 3. Clear Blizzard Cache and AppData Corrupted local files can trap you in a download loop. starcraft 2 preparing game data
The "StarCraft 2: Preparing Game Data" screen is a common roadblock that occurs when the game client attempts to synchronize assets or download missing language files immediately after you hit "Play" in Battle.net. For most, it is a brief step; for others, it becomes a loop that downloads roughly 600MB at extremely slow speeds every single launch. Common Causes for the "Preparing Game Data" Loop A known legacy issue with the Blizzard downloader
Press Windows Key + R , type %ProgramData% , and delete the and Blizzard Entertainment folders. Repeat this for %AppData% , %LocalAppData% , and %Temp% . 4. Disable "Auto-Detect Settings" in Windows Note: This may require you to log in
Let the game download the small update, launch it, then close it and switch back to your preferred language. 2. Bypass Battle.net with SC2Switcher