Windows 10 0xc000021a Error

[PrestonFavors]

I have tried multiple things to get my computer to get past this error. I am unable to get my PC to factory reset, as every time I try to it ends up failing every time. I have tried repairing with a repair USB drive, but whenever I get to the command prompt screen, and I try to use all the bootrec commands, the bootrec /fixBoot command says that access is denied. I am at my wits end with this, so I would appreciate some help.

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