New
#350
It is no longer possible to have running W8.1 and W10 in combo as M$ locks the drive.
As W10 is to be an updated version of W8.1 they are inextricabally linked, so to use either you must disconnect one ot the other.
To free your locked W10 disconnect W8.1, restart your computer, and using your W10 iso you can repair the drive.