@Mick481
Welcome to the HP support community.
Use this link to register the HP product:-Click here
If you are unable to register on that site, raise a requite and update the warranty by following the steps mentioned in this link:- Click here
Keep me posted.
If this helps, please mark the public post as an accepted solution so that it benefits several others.
Cheers.
Sandytechy20
I am an HP Employee