: The license is locked to a single, specific computer using a digital file ( .lxk ) or a USB hardware dongle. Network License (Floating Key)
These are paid licenses for commercial or advanced engineering use. They can be purchased directly from the Labcenter Pricing Page Educational Licenses: proteus software license key
During or after installation, open the Proteus License Manager . : The license is locked to a single,
Labcenter Electronics offers several flexible licensing schemes to fit different user needs: Perpetual Licensing proteus software license key
There is no "public" free key. However, many universities provide free keys to their engineering students. Ask your professor. Alternatively, use the free "Proteus Lite" (no key required) or the 30-day trial.