"Yes, Bonzo - but only 120 GB (they expect us to use cloud storage, I think) with only 16.5 GB left (I think we are supposed to leave about that much for updates, etc.). Thus, I added the above 60 GB card."

No way will I entrust my data to cloud storage. I have a 500gb ssd and 500HDD in my Lenovo Thinkcentre.

I can't remember if I put this elsewhere, but 2 weeks ago I ran the MS utility to see if my Thinkcentre can run Windows 11. It told me that "secure boot" was not enabled - easily remedied in bios..........but then on restart I got "Error 1962: No operating system found. Boot sequence will automatically repeat." So Lenovo owners beware!

After many frustrating hours of trying to solve the problem using various "fixes" I came accross a fix that worked. All that was necessary was a couple of tweaks to the start up bios - enable CSM, and in Boot Priority change Legacy First to UEFI First, whatever that does. Then on startup I got the endless circle followed by the magic words "Getting Devices Ready" - home and dry!!