From the screen shot. You did not run as Admin.
try reagentc /enable again
My eyes are really killing me, so it is hard to see the info in the two Command windows. Are you up to trying TestDisk to see if you can rescue the Partition table, as long as it is not corrupted? https://www.geekyprojects.com/storag...-table-or-mbr/
Hiren's has always been the go to for everything on a disc/USB key toolbox. http://www.hiren.info/pages/bootcd