uhh if even the reset this PC tool didnt work im pretty sure everything in your system is fucked up. The best solution would be formatting your PC and installing windows from zero
Maybe using Media Creation Tool to update your system using the option to delete everything can work, but im not sure (sometimes it fix Windows' errors)

I dont know how to "save" or "fix" your system keeping your files intact tho, you should backup your stuff and hard reset your system imo