We upgraded 3 machines. The only one where CS5 did not work is the one where we did the digital upgrade from Windows 7, to 8 and then to 8.1, then to 10.
On the other two machines, I outright purchased Windows 8.1 OEM and installed fresh. BOTH of those machines have no issue at all with anything, including CS5.
Thus, I am thinking the problem people are having with Photoshop is due to performing the upgrade from 7 to 8, then 8.1 as that's the scenario that caused us grief. But going direct from a clean install of 8.1 to windows 10... zero issues.
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