A USB or parallel port dongle that must be connected to the computer. The software checks for this physical "key" and its associated license.
For many firms, it is more cost-effective to upgrade to the latest version of Presto (e.g., Presto 2022 or newer) which offers better integration with BIM (Building Information Modeling) and cloud features.
A newer standard for managing licenses across a network, though less common for version 8.8 specifically. How to Obtain and Use Authorization Codes
Because Presto 8.8 is an older version, modern operating systems like Windows 10 or 11 may require "Compatibility Mode" or specific drivers for the physical USB dongles to function correctly.
Are you having a appear during activation, or are you trying to move an existing license to a new computer? Presto 22.03 setup guide (29/06/2022) - RIB Spain