I have seen so many people with problems with this method Adobe uses to update Flash player; mainly because of their certified bloatware McAfee Security Scan Plus which is rubbish as practically all computers now days have AV, that's the only reason they do this IMO. If you read towards the end of this you will find a better solution, way easier solution.
Some insight on Flash player versions on the Windows platforms.
In windows 8.X and Windows10 Internet explorer's flash player is handled by Windows downloads as it is integrated into Windows.
Google Chrome's Flash player are embedded in Chrome and maintained by Google; Simply uninstalling and re-installing chrome could resolve any tough issues. Google Chrome usually updates automatically. in any version of Windows
Firefox's Flash player are installed via this site and are NOT automatically updated at this time from Mozilla.
Edge browser is maintained the same way Internet Explorer's Flash player is handled in Windows 10 by Windows updates.
So, Just because they are using Windows 8, there are different ways to maintain flash player. Nothing is simple at this time.
IF you are on Windows 7 then you need to literally manually update two of the 3 versions manually; all 3 if you use Opera as an optional browser
Windows 8.X and up you need to update only the NPAPI version if the user is using Firefox, Otherwise update chrome, or run Windows updates to update flash player.
I have a partial solution for anyone, but this will have zero effect on Internet Explorer or Edge on Windows 8.X or Windows 10. ONly for Opera of Firefox
For Windows 7 it takes care of all of them.
If you click on my name and then it will open my profile on here, then under personal , click more detail then Use the URL under my URL.
Hope this information is useful
Best regards.