Sometimes the file is there, but Windows doesn't know how to "speak" to it. Most portable games require specific libraries to function. Download and install the .
In simple terms, (often associated with the codexcdx.dll file) is a library file used by certain software to manage game data, Steam emulation, or licensing configurations.
This is the #1 culprit. Windows Defender or third-party antivirus software often flags and "quarantines" (deletes) this file because it behaves like an injector.