My Windows Update isn't showing me nothing, just the "last update at 00:00"

[Microsoft Windows]

My windows doesn't let me do anything, change the wallpaper its something i can't too, cuz the button appears at the same, if i try to put an image like "set it as background" it appears an error, i tried booting an usb, but my pc can't recognize em, i really hope there's a fix for it, i don't wanna miss all my documents from school and games

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