Zenned uses the most modern procedures to warrant that it works prime.

Even then software is complex. And in rare occasions any software you install, Zenned or not, may interact with your system and make it fail in the most unexpected ways.

Hence you shall be prepared for failures to happen. Carry always an installation live USB with you, have the contact of your favorite computer technician at reach, and use backups (see recommended software).

Ultimately Zenned and its software is provided as is, and you assume the responsibility of it working well for you. Including it being absent of failures, being merchantable, or fitting a particular purpose.