I earlier posted a question related to system restore not working. With a lot of reading and help from experienced members (thanks Bulldod), I did resolve the issue by renaming / deleting the mal-fuctioning "windowsapps" folder. (A project in its own right)
Everything seems to work. I can do a system create / restore, all app are still there and functioning, SFC finds no errors and I can still install new apps from the store.
So it seems to have fixed the issue but knowing "murphy'slaw" personally, I have to ask what I may have lost or changed by deleting "windowsapps".
Does anyone have any information / details on what issues I may have created?