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This game uses Ruffle to run Flash content. If it doesn’t start, make sure ruffle.js and pocket-emo.swf are in this same folder.

Starcraft 2 Preparing Game Data Jun 2026

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.

Currently, StarCraft 2 loads map data, assets, and replay info at the start of a match or replay. This leads to: starcraft 2 preparing game data