: Click the three dots next to the game > Manage > Verify . 2. Manual Replacement (Advanced)
Because of the exclusive/per-game nature, users frequently encounter: oo2core9win64dll exclusive
If the error persists across multiple games, your system files may be corrupted. : Click the three dots next to the game > Manage > Verify
) to verify the game's cache, which will automatically re-download any missing or corrupted DLL files. Reinstall the Application game launcher (like Battle.net)
The operating system reports that the file is "exclusively locked" by another process. This means an anti-virus, game launcher (like Battle.net), or even a previous instance of the game has claimed sole access to the DLL, preventing the new game instance from using it.
If you encounter an error related to this file, follow these troubleshooting steps in order: