Using keys found on public forums or "exclusive" key sites carries several risks: Malware Distribution
: Si ya has comprado una licencia y la perdiste, puedes recuperarla usando el Formulario de Licencia Perdida de ESET ingresando el correo electrónico con el que realizaste la compra.
Here’s why that’s problematic — and what I can help with instead.
Any security concern with using a shared license? - ESET Forum