I have the same operating system (W8.1), and use the 5.0 or 5.5 with Claymore 9.3 or 9.4.
Similar situation, not working.
Do you use -esm argument??? Did you run it as administrator??? Do you mine ETH??? What pool do you use? What port you have entered to no fee?
I use the 9.3 or 9.4, with 5.5. there is display of DevFee mining detected: etc. So it is working.
I mine with the
https://ethermine.org/ after removing -esm 1.
However, there is no display of reported hash any more. How do we get back reported hash?