I have run sfc /verifyonly which found some corrupted files. the ran sfc /scannow that corrected these.
That made no difference, PC would still not shut down.
I then used the guide to do a repair install, and why I don't know but I ended up somehow with limited options, including system restore but was advised that doing this under the process I was using meant that it could not be undone. I also found that my USB mouse went on strike and using Tab was a right pain.
I rebooted and hit system restore which worked and I restored to before the 12 file update, of course these updates were re-installed and on restart then shut down I was back to square one, it would not shut down
Perhaps its time to do a clean install
IS it normal for USB mice to go on strike? I have recently replaced my old one with a new USB version.