To install a library, you first need to to know if it works with the free KONTAKT Player software or if it needs the full version of Kontakt. To do so, you can look for the mention "Works with KONTAKT Player" or "Full version of KONTAKT needed" on the product page. Once you have this information, follow the steps below : KONTAKT Player libraries KONTAKT Player libraries installed and authorized on the Native Instruments Native Access application using the serial number provided after your order has been processed. If you don't already have Native Access installed on your computer, you can get it here. Log in using your Native Instruments username and password, or create a new account. If you do not have KONTAKT or KONTAKT Player installed yet, you can install it from Native Access. Click (+) Add a serial and enter the library serial number sent by email. If you didn't receive it or can not find it, please contact us so we can provide it to you again. Then, click the Install icon next to the library you just added. The library will now be downloaded and automatically added to your KONTAKT libraries. Full KONTAKT libraries After your order, a download link will be sent by email. If you didn't receive it or can not find it, please contact us so we can provide it to you again. Once downloaded, unzip the file, and place it wherever you want on your computer or hard drive. To load the library, simply double click or drag and drop the .nki file in the KONTAKT empty rack.