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aariel_is
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Posts: 7
Registered: ‎06-06-2017
Location: US
Views: 1,929
Message 1 of 3

Lost Bluetooth Device in Device Manager

Yoga 2 Pro, Win 8.1

Blueooth device disappeared.

Trying to repair the Intel Wireless driver. (bt247w81.exe)

 

This is a two stage process.

Stage one ends with "Completng the Intel bluetooth Driver SEtup Wiazard" with "Install Intel Bluetooth Driver now" checked.

Click "Finish"

 

Stage two 

Starts with "Welcome to the Intel PROSet/Wireless Tools Installation Wizard", proceeds to Repair and fails with:

 

"Cannot write value C:\Program Files(x86)\Intel\Bluetooth\ to key \SOFTWARE\Microsoft\Windows Defender\...\Paths. Verify that you have suffifcient access to thhat key..." error when attempting to write to registry.

 

I believe this is because bt247w81.exe launches the Intel driver installer without admin privileges.

I've tried launching bt247w81.exe with "Run as Administrator" and launching it from a cmd.exe which has been launched as Administrator.

 

How am I supposed to install these drivers?

aariel_is
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Posts: 7
Registered: ‎06-06-2017
Location: US
Views: 1,918
Message 2 of 3

Re: Lost Bluetooth Device in Device Manager

I had to turn off "Windows Defender" to install the Intel Wireless driver.

Bluetooth device still not showing up.

 

Why does the Yoga 2 Pro periodically lose devices like WiFi and Bluetooth?

aariel_is
Fanfold Paper
Posts: 7
Registered: ‎06-06-2017
Location: US
Views: 1,894
Message 3 of 3

Re: Lost Bluetooth Device in Device Manager

Bluetooh device in Device Manager was hidden.

Revealed by going to "View > Show hidden devices".

 

The reason it's hidden appears to be that the "Bluetooth Support Service"  was set to manual start.

This is a side effect of the driver re-install?

 

Setting service start to Auto and starting didn't appear to fix the problem either.

But a reboot did.

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