Windows 10: Bluetooth not found in Device Manager and BIOS - Bluetooth MT7921 Model

I've had experiences where my Bluetooth driver would go off, but can be found in device manager and be fixed after a quick reinstallation from the ASUS driver. However, this is not the case currently, and instead is gone from both the hidden devices tab under "View" and from BIOS. At first, I was using the laptop with my headphones connected, and it starts to enable and disable itself, and if no longer enables again, I restart the laptop for a fix. After some time, even restarting no longer works. I check device manager every after restart and install the most updated driver for the laptop, bu

:)

 

Deleted all of Bluetooth in Device Manager

Those should have been the drivers for the model you listed.
Open device manager and see if they are there.
As for turning on go to the notifications box (Far right on the task bar) click on the bluetooth symbol.



If not there, right click choose edit and add it

 

Bluetooth Technology Gets Faster With Bluetooth 3.0

From its annual All Hands Meeting in Tokyo this week, the Bluetooth SIG formally adopted Bluetooth Core Specification Version 3.0 + High Speed (HS), or Bluetooth 3.0. This latest iteration of the popular short-range wireless technology fulfills the consumers' need for speed while providing the same wireless Bluetooth experience – faster. Manufacturers of consumer electronics and home entertainment devices can now build their products to send large amounts of video, music and photos between devices wirelessly at speeds consumers expect.
Bluetooth 3.0 gets its speed from the 802.11 radio protocol. The inclusion of the 802.11 Protocol Adaptation Layer (PAL) provides increased throughput of data transfers at the approximate rate of 24 Mbps. In addition, mobile devices including Bluetooth 3.0 + HS will realize increased power savings due to enhanced power control built in.


"Like Ricky Bobby in Talladega Nights, this latest version was 'born to go fast,' said Mike's Blog, Ph.D., executive director of the Bluetooth SIG. "Utilizing the 802.11 radio was a natural choice as it provides efficiencies for both our members and consumers – members get more function out of the two radios they are already including in devices, and consumers with Bluetooth 3.0 + HS products will get faster exchange of information without changing how they connect. We are excited to expand the possibilities of the PAN."

This newest version of Bluetooth technology builds on the inherent qualities of the current 2.1 + EDR version, including Simple Secure Pairing and built-in, automatic security. And as with all versions of theBluetooth specification, v3.0 + HS provides developers, manufacturers and consumers with the benefit of backwards compatibility, enabling both the expansion and enhancement of this technology with every new specification release. Once products reach the market, the easiest way for consumers to learn which devices are compatible with other Bluetooth enabled devices is to visit the Bluetooth Gadget Guide.

Applications
With the availability of Bluetooth version 3.0 + HS, consumers can expect to move large data files of videos, music and photos between their own devices and the trusted devices of others, without the need for cables and wires. Some applications consumers will experience include:

• Wirelessly bulk synchronize music libraries between PC and music player or phone
• Bulk download photos to a printer or PC
• Send video files from camera or phone to computer or television

Availability

The Bluetooth SIG's formal adoption of the specification is only the first step in the product lifecycle. News out today from wireless chip manufacturers and Bluetooth SIG member companies Atheros, Broadcom and CSR shows the second step – getting silicon solutions to device manufacturers – is already underway. End products for consumers are expected to be in the market in 9 to 12 months.

Technical Specifications
This new specification release includes several major enhancements (learn more here - page requires member login):

• Generic Alternate MAC/PHY (AMP)
• 802.11 Protocol Adaptation Layer (PAL)
• Generic Test Methodology
• Enhanced Power Control
• Unicast Connectionless Data

Source: Engadget

 

Deleted all of Bluetooth in Device Manager

Did you mean that the BT entry in Device manager is hidden?There should be a Bluetooth section within which your Bluetooth adapter should be identified by name [Intel, in my case]. Here's an example.


If the adapter entry is 'hidden', it means that Device manager no longer detects its presence.My own Device manager no longer greys out 'hidden' devices so I have to set-unset the Show hidden devices entry to check which are 'hidden' and which are not.
I suggest you -
1 Check in your Bios for any enable/disable setting for it.
2 Get your Service manual and check the hardware itself [post #9].

I'd still like to know exactly what you did.

Denis