I decided to take the plunge and upgrade the OS to Windows 11, from W10 Pro.
So far the following appear to work, though a couple are reluctant to close down.
Sharpcap
Lunt Solar Controller
Lakeside Focuser
Pegasus Ultimate Box
That's as far as I've got so far - the upgrade took a few cycles of download/install before it finally completed. It looks different to 10 - cleaner perhaps, though this particular PC has a limited astro use.
Not used in the wild, as yet, it'll be a while before I get myself sorted ( one part still to arrive )