The download was finished. But Kael wasn’t playing Call of Duty anymore. Call of Duty was playing him.
The error in Call of Duty: Modern Warfare 2 (both the 2009 original and modern iterations) is a common "Disc Read Error" indicating that a critical user interface file is either missing, corrupted, or failed to download . This file is responsible for loading menus, buttons, and icons. Error Summary
If one file is missing, others usually are as well, leading to a chain of errors.
If you want a mod menu, do not download a standalone ui.ff . Download a complete mod tool like:
If verification fails and antivirus restoration fails, the directory structure itself may be corrupt. In this case, a clean install is necessary.
Sometimes the file exists, but the game's config file is looking for it in the wrong place or with the wrong parameters. Resetting the game's configuration files can force the engine to re-read the directory structure.
Rather than downloading a potentially unsafe file from a third party, it is recommended to use official game repair tools: Verify Integrity (Steam): Right-click on in your Steam Library. Properties Installed Files (or Local Files).