Real-time scanning can corrupt game file verification. Add MW2 folder to exclusions:
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This article breaks down what causes the pregfxmpff error and provides a step-by-step guide to fixing it so you can get back to the action. error codepregfxmpff modern warfare 2 better
Below is a guide on how to resolve these types of graphical and file-based errors in Modern Warfare 2. 1. Verify Game File Integrity Most errors containing file extensions like Real-time scanning can corrupt game file verification