Essential windows functions stopped working

[Windows 10]

Hello, today my windows started to stop doing windows things, let me introduce the problems:-search bar stopped working-cant open powershell-cant oppen settings app (There’s a problem with Settings. Refreshing your PC might help fix it.)-cant right click on desktop, inside file explorer, even if i can right click on something, a lot of options went missing (properties etc.)-can not move essential files to external usb drive to save them before resetting pc-windows+R doesnt workDont really know what to do about it , no way to update windows while this problem is live, cant reset the pc because

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