integrated bluetooth adapter not detected by the laptop

Hello everyone,
I have a problem that is driving me crazy. The integrated Bluetooth adapter of the wireless card atheros qualcomm Killer n1525 most of the times is not even detected by the laptop. In fact, in Device Manager is not even listed. Only a few times, and for no particular reason (at least that I can understand), bluetooth magically appears when I start the laptop, and then disappears again in the next boot. In one of those moments I tried various drivers, and those recommended by the manufacturer can operate perfectly bluetooth, that the few times is detected shows no malfunction. I tried several times to open the PC and remove/replace the wireless card, and each time the Bluetooth appears, but only temporarily. Further inform you that the wireless card works perfectly and I have never had problems. By clicking on "Show hidden devices" in "Device Manager" of course I can "see" the Bluetooth. Post some pictures of the properties of the device. I thought that the problem can be traced to a problem of conflict between devices but I tried to start the computer in Safe Mode or disconnect all USB devices without result, and frankly I would not want to format the pc just for that and I would not even change the wireless card, as with the Killer I am quite well. Tips?
Thank You and sorry for my english. I’m italian
P.S. the laptop is the Clevo P650SE

These are the screenshots

 

The Bluetooth problem is not with the Killer N1525 but is with the Clevo notebooks.

There's reported N1525 problems with Clevo models that should have been fixed with the newest bios and EC updates
http://repo.palkeo.com/clevo-mirror/P65xSE/

EC 1.03.06 fixes:
1. EC for P6xxSE.
2. Improve Killer 1525 support.
3. Refer to readme_EC.txt for instruction.

Newest Killer N1525 drivers can be found at this link;
http://www.killernetworking.com/support/driver-downloads

Hope this Helps

 

I have already flash the bios with the premamod version and in the site there is this warning: " DO NOT USE ANY RANDOM, NON MATCHING BIOS AND EC VERSIONS! DOING SO MAY CAUSE A NON BOOTING SYSTEM!"
I'm afraid that this Ec Version can create problems. Should I flash again the bios with this 1.03.06 version first???

 

I think it would be best to post in the Clevo/Sager forum for the info you seek.
I'm not a Clevo owner.