You can find original disc images and Windows 10-compatible installers on the Internet Archive .

The PC version of Nightfire was developed by Gearbox Software and differs significantly from the console versions, offering specific enhancements: The Greatest Bond Game Ever? - Scanlines' Journal

If you are using an original retail copy, you must download and install the community Patch v5.91+ to fix the in-game server list and ensure compatibility with modern hardware. Key PC Features & Improvements

Locate and run SetupJBN.exe or the provided installer.