If you see an "exclusive access denied" error, Windows Ransomware Protection might be blocking the game.
Go to Settings > Update & Security > Windows Update and check for updates. 4. Reinstall Visual C++ Redistributables
The word "exclusive" is key here. Because Oodle is a commercial SDK, the oo2core_9_win64.dll file is "exclusive" to each game developer's license. While the file may have the same name across The Last of Us Part I , FIFA 23 , Destiny 2 , and Warframe , the underlying versions can differ. This leads to potential compatibility problems.
“oo2core_9_win64.dll is either not designed to run on Windows or it contains an error.” oo2core9win64dll exclusive
Infinitely long shader cache build, heavy stuttering, VRAM leakage.
If the file disappeared suddenly after a game mod installation: Open (or your third-party antivirus app). Click on Protection History or Quarantine . Look for any actions associated with oo2core_9_win64.dll . Select the file and click Restore or Allow on device . Step 4: Run the System File Checker (SFC)
If you encounter the more persistent "exclusive access" error, you now know it's a matter of permission conflicts and can be resolved by restarting your PC, adjusting your antivirus settings, or ensuring no other application is holding the file hostage. By following the troubleshooting hierarchy outlined in this guide, you can reclaim control of your system, banish the error messages, and get back to what matters most: enjoying your games. If you see an "exclusive access denied" error,
If you are looking for technical documentation on the technology behind this DLL, you should research . RAD Game Tools provides extensive technical deep-dives into how Oodle achieves high-ratio, high-speed decompression on their official site or via the Epic Games Developer Portal .
(now owned by Epic Games). It is used by developers to shrink game files and speed up loading times by decompressing data on the fly. The "Exclusive" Fix: Why Gamers Swap It
: Click the three dots next to the game > Manage > Verify . 2. Manual Recovery from Another Game This leads to potential compatibility problems
Only proceed with manual replacement if you have exhausted all other options. If you have another PC with the same game installed, you can safely copy the DLL from the working PC's game folder to the affected PC via a USB drive. If this is not possible, and you must download the file, ensure the source is reputable. Some community mods have hosted the file specifically for known issues, such as the "Oodle v2.9.5 memory leak fix" for The Last of Us Part I . Even then, verify the digital signature of the file if possible and always run a deep virus scan before using it.
An official patch is the safest and most reliable solution. The error may be a widespread issue, and the developer could release a hotfix. For instance, the developers of The Last of Us Part I eventually released patches to replace the faulty oo2core_9_win64.dll included in the game, resolving the memory leak issues.