From Hdsentinel can you tell us what the windows 10 drive is, if it is an M2 drive or a drive running in raid mode then windows 10 may need a driver added to the install to access the drive.
When I am on windows 7, which is most of the time, especially now, win 10 would be on drive F. Of course when i am able to use win 10 it becomes the C drive. The HDsentinel said "No Action needed". Funny, I have been getting stuck in a Chdsk mode for both of my hard drives for months...most of the time i cancel it and sometimes i let it run its course. I have been looking for a way to stop this 'bug'...so i recall doing it complete about a day just before win 10 stopped, so i can't see what good it would do again now, do you? I believe the hd is neither raid or M2 , i do not have M2 slots on my Motherboard.