Thanks for advising those two updates are required. The laptop in question had been out of circulation for a while hence lack of updates. Have caught up to point of including those two and ran the 7.2 installer over top and it worked.
The most disconcerting thing really was that the error reports '...your outdated version of microsoft windows', but it's not the OS major version number (Win7) that's the problem, its the patching for that version. If it had just stated 'your updates are too far behind', we'd look further and go oops and fix it.
But Thank You very much for a concise set of responses and solution.
Alex