Starcraft 2 Preparing Game Data

Aggressive antivirus software (Norton, McAfee, even Windows Defender’s "Controlled Folder Access") scans every file the game tries to "prepare." Since SC2 loads hundreds of small files rapidly, the antivirus creates a massive bottleneck. The game waits for permission; the antivirus waits for the game.

The default 64-bit client has memory management issues with older assets. Force the game to use the 32-bit client. starcraft 2 preparing game data