Disappointingly the repair programs' registry restore did not reinstate Solitaire.
I have since opened a Command Prompt (Admin) and ran the following cmds, neither of which has reinstated Solitaire.
dism /online /cleanup-image /startcomponentcleanup
dism /online /cleanup-image /restorehealth
sfc /scannow
While I can easily restore mine as I created a system image before running WR, the next step would be to perform a repair install which doesn't affect your personal stuff or 3rd party programs, but will need install media for this.
It's too late for me to do this as it's about 11.30pm here in the UK and it takes a few hours to complete and I don't like leaving my laptop on overnight - so it will be a job for in the morning.
If you haven't already created install media, you can do at
https://www.microsoft.com/en-gb/software-download/windows10 after reading the instructions as the steps differ depending upon whether you want to use a DVD or an USB.
When you have crested the media, open Windows Explorer - This PC and with the media inserted and recognised in its drive, double click on it.
If using a DVD this will start the process but if using an USB, that will open the files where you'll either need to double click on setup Application or right click on that and select Run as administrator.
There's initially a little user input but then it will get on and do its thing.
I normally Ethernet connect for this as hopefully it won't takes as long to download the updates during the process.