"Bluetooth Controller" error

[Microsoft Windows]

My Asus device's device manager doesn't have the Bluetooth section it used to have and it seems there's a problem with the Bluetooth controller. In the Properties section, it says the drivers for this device aren't installed. When I search automatically, it says it can't be found. There's no on/off button for Bluetooth in the settings section of the device. It used to work fine. How can I fix it?

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