If you bought a 1-year plan and 12 months have passed, the key remains valid for installation but not for activation. Fortect will give a “subscription expired” error.
While a key found on a forum or a YouTube video description might technically "work" for a moment, it is rarely sustainable. Developers utilize server-side verification to blacklist keys that show suspicious activity. If a key is shared publicly, thousands of users may try to use it simultaneously. Once the developer detects this, the key is revoked, and the software reverts to the unregistered state. fortect activation key work