My computer refuses to install Version 20H2 feature update from Version 1909. It comes up with an error after apparently installing which is to do with "BOOT_SAFE" phase(?). Any help would be appreciated. By the way, I've gone through all the drivers in Device Manager & checked they're all up-to-date. I've tried to install this feature update many times already without success & it's starting to drive me nuts as I can't afford to replace my PC if I can't get this update in.

