Recovery Your pc/ device needs to be repaired Error code 0xc000000f

Hello, I have had this popped on my machine, I have a dell XPS 8910 with windows 10

i have tried bootrec /fix mbr

then bootrec /fix boot (access is denied)

so i could not continue, i have done this with and without usb windows 10.

i cannot do a system restore or a keep files and delete apps restore.

i think restore to manufacture is only a option,but i do not want to delete my dell/windows as i have two hard drives installed and no restore cd.

please can you help.