I have a copy of my medical reports, including my scans and xrays from an accident that I had in 2012.
I get all these reports in the very same way, and they will not run under 8.x or 10, but they are fine with 7 and below.
I have of course tried the compatibility options, but they dont make the blindest bit of difference.
So, because of this, I have no choice, but to make sure, that I have at least one PC that stays with Windows 7.
There are legitimate reasons to need to stay on Windows 7.
Of course, there is alos the simple fact, that Windows 7's visuals are just bloody amazing, the boring bland windows etc on 8 and over, are simply awful, and visually, I very much prefer to use Windows 7 over anything else.
That said, my main PC is running 8.1 and my main Laptop I have upped to 10 just to give it a long test, and in both cases, I am very happy with them, so aint I the hypocrite?
I do also have the entire Stardock suite of junk, and I use ModernMix with Win8 ( Win 10 thankfully means that is no longer needed ) and Window blinds does help me somewhat towards the Win7 look, however, I have not bothered with that for some time now either.