If you'd like, I can help you find the for a legitimate license or walk you through setting up a free alternative that won't compromise your security.
A forum post from 2022 with a list of alphanumeric strings. The Third Link: A "shopping" tab offering keys for $0.00. Eset Nod32 License Key Free - Search Shopping
Black Friday and Cyber Monday usually see price drops of 50% or more. If you'd like, I can help you find