Try this solution: worked for me and my friend.
Win 10 didn't give me access to both my galaxy s7 and s4.
The only thing I had to do was :
win + R -> regedit
HEKY_LOCAL_MACHINE --> SYSTEM --> CurrentControlset --> Control --> Class --> {EEC5AD98-8080-425F-922A-DABF3DE3F69A}
delete...