HP T630 secure boot help

Greetings to all on this marvelous community forum and thanks to all who’s posts have helped me in the past.

For background, I have installed HAOS onto a HP T630 Thin Client with success and have enjoyed setting up a zigbee network to automate heating and lighting.

My question is regarding the initial boot of the TC and receiving a ‘Secure Boot Violation’ message. I can resolve this by disabling the Secure Boot in BIOS to get up and running. However, following a power outage and the TC auto-powering up, there will be the same ‘Secure Boot Violation’ message. I have spent many hours trawling the web for a suitable answer without success.

Are there any members running HAOS on a HP Thin Client that are able to advise on BIOS settings to negate the Secure Boot being enabled after the TC restarts?

Many thanks in advance.