Run Native Access as an administrator on Windows.

If your library doesn't have a serial number (common for "Full Version Only" libraries), it won't appear in the Libraries tab. Navigate to your folder within Kontakt.

: Once the tool is installed, you can start downloading top-rated libraries. Websites like Soundsmiths, Arturia, and the official Native Instruments shop offer a variety of libraries. Always check compatibility with your version of Kontakt.