Windows 10: Bluetooth Missing From Devices and it cannot be turned on

Lenovo 81YMIdeaPad 5 14AREE05 This is the model of the laptop. As the title says my bluetooth is giving me troubles , it constantly disappears from the devices and it cannot be turned on. I have tried the bluetooth troubleshoter and it just tells me that the blueetooth is not present on the device. I have tried installing and updating different drivers. I even had the laptop preinstalled from scratch. I also bought an external bluetooth adapter - nothing is fixing the issue. Can you suggest me what should i try to solve this issue.

:)

 

I don't have any bluetooth devices but windows turned it on!!

1. I have no bluetooth devices in devices manager.
2,3,4. they all turned off before.

reboot or shutdown doesn't solved it.
i have USB wireless Mouse/Keyborad. i plug it out and use PS/2 but nothing.
i used DISM to repair image.

i tried everything but its not make any changes and windows still showing Bluetooth turned on.
a few days ago it was not even showing Bluetooth in Action Center but i don't understand what happened, no devices added or changed in my PC, no software Installed or Uninstalled, not a single Settings Changed in Windows or BIOS!!!

 

I don't have any bluetooth devices but windows turned it on!!


Then if they are still on, try some of these steps listed below, Not all of these steps may not apply, but, step #2 and #4 should help. I have all 4 steps on myself.

1 Go to Device manager and DISABLE Bluetooth, Do Not remove!
2 Turn USB suspend off
3 Set Hard Drive or SSD to Never
4 Turn Link State Power Management off
Settings 2 thur 4 can be found in your Power Management Settings.
Then click on "Change settings that are currently unavailable"
Then Reboot your Computer. This does work, may come back if you shut OFF your computer,then turn it back on, if it does, just a reboot will turn it off again.

 

Bluetooth is not working — troubleshoot claims I don't even have it

I have done all the following steps:

- installed bluetooth driver from manufacturer
- hit windows update
- updated / uninstalled bluetooth items listed in Device Manager and restarted the PC
- updated / uninstalled USB drivers listed in Device Manager and restarted the PC (USB drivers automatically came back but not bluetooth)
- turned on and restarted all bluetooth support in services.msc
- conducted bluetooth troubleshooting
- conducted hardware troubleshooting