Since a restart seems to bring it back up, try disabling Fast Startup from your power settings. You can find the toggle under: Control Panel >> Power Options >> Choose what the power buttons do

You could also try disabling and re-enabling the Bluetooth device in the Device Manager to save yourself a restart.

But if the Bluetooth device doesn't appear in the Device Manager either, then it could be a physical issue with the card.

https://answers.microsoft.com/en-us/windows/forum/all/bluetooth-disappered-from-device-manager-with/fd246f79-c31c-40a2-a0a1-5660e0e07cfc

Check out the post by digitiser.

The summary is:

• Turn off computer
• Unplug power
• Hold power button for 90 seconds
• Plug in
• Boot

The idea here is the motherboard doesn't see the bluetooth chip and by holding the power button you are draining the capacitors and allowing the chip to reestablish a connection.

The problem is not due to drivers, fast boot or USB problems. In fact, it's simpler than it looks.

I ran to the same problem 4 days ago. After researching for 4 days, I finally found the solution. You don't have to update Windows or install fresh one.

The problem is the BIOS settings. Just find the latest drivers for the BIOS of your motherboard from the manufacturer's site and install it. That's all.

If you don't know how to update BIOS drivers, you can follow the following steps.

• Download the required drivers from the website of your motherboard's manufacturer.
• Extract the zipped file with any unzipping software (I recommend 7z). Copy that file to any USB flash drive/pen drive.
• Restart your system and go to the BIOS settings by pressing the "x" button on the startup screen. "x" is different for different models. For me it was F2 as I have an Asus Vivobook X-series. Every laptop's manufacturer defines its own key to change the BIOS settings.
• After that, update the BIOS using the USB drive. Usually, the BIOS update option is in the advanced tab, but just like "x", every BIOS is different. You have to find the suitable menu option to update the BIOS for your system.
• Initiate the update process. It will take some time. After that, restart your system, and you are done.

You will be able to find the missing Bluetooth option in the device manager. And your USB issue should be solved automatically after updating the BIOS. Only update if if your problem isn't solved.

This article shows other ways to update the BIOS:

I found a solution that seems to work for me.

1.) Uninstall everything that is Bluetooth-related that is listed in Programs & Features.

2.) Uninstall all Bluetooth-related drivers listed in the Device Manager.

3.) Restart the computer. Bluetooth will be reinstalled, and you can reinstall the programs that you removed from Programs & Features.

The problem is mainly because the drivers provided by vendor does not support windows 10 (this happens if you have migrated from windows 7 or windows 8.1). Reinstalling the bluetooth driver (Programs and Features)only would solve the problem.