Hi Paul,
In the end I got my self a new NUK system (Gigabyte Brix) with Windows 10 professional installed which is dedicated to the observatory. I had to re-install all of the software, but now I know it is all up to date. It is so small that I’m able to quickly disconnect it and bring it in after observing should I wan too. Rather expensive, but I was tired of older used re cons giving up the ghost after a couple of years. So far it seems ok, but I’ve not had that much observing done.
Eric