The installation script decompresses the highly throttled audio and video files back into formats the game engine can read.
This is the most common error during decompression. It indicates your RAM or system pagefile ran out of memory while handling the dense file structures.
— Use legitimate BitTorrent clients like qBittorrent, μTorrent, or BitComet. Avoid "Xunlei" or other aggressive download managers that can corrupt files.
Step-by-Step Guide: Making a Highly Compressed MW2 Work on PC