To activate , you must enter the serial number provided with your purchase into the program's activation menu. Activation Steps for Fritz 18

What to Do If You Already Used a Fake "Verified" Key

If you downloaded a crack or entered a key from a suspicious source:

Internet Connection: Ensure you are connected to the internet during this process to register the program successfully. Offline Activation

3.3 The Verification Experience

AVM has streamlined the verification workflow:

If you do not have a key, you can purchase a verified license from these authorized retailers: ChessBase Official Shop

For computers without an active internet connection, you can perform a manual verification:

Download Version: If you purchased Fritz 18 as a download, your serial number is located in your shop account on the ChessBase Shop website alongside your installation files.