I upgraded a while back on my imaging laptop, everything works but as mentioned prolific adapters need a workaround.
I need to stay on windows 7 on my two desktops and this little app has helped, I used the standalone version and it's removed all traces of the upgrade box;
http://blog.ultimateoutsider.com/2015/08/using-gwx-stopper-to-permanently-remove.html
Hope this helps someone avoid a lost night of imaging.
Cheers,
Ian