>>Yes, I mean the Bluetooth vendor or any device that you are trying to connect to your PC. They must provide a driver for the respective operating system, but remember windows 7 is near to be ended in support and maybe they are not providing support anymore.
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>The PC will be upgraded to Windows 10 next week. So, I will do another test.
>
>Thanks

I don't recommend an update. Instead I recommend that you buy a brand new SSD as boot drive, and install Win10 and all the necessary programs from scratch. If you are anything like me, you will be surprised how many programs you have installed, but can live without.

You can reconnect the old boot drive after Win10 is completely installed, but reconfigure it as another volume, like O: (for old).