Hello Ran,
Thank you for posting your query on Microsoft Community.
As per the issue description Designer Bluetooth Desktop (BLE) is not being recognized by your computer. The issue could be if Bluetooth service is not running or there is some drivers issue. So, try the below mentioned methods and see if it helps you to fix the issue.
Method 1:
You may try running the Hardware and Device troubleshooter and check if it helps.
a. Press Windows Key +R, type Control Panel.
b. Type troubleshooting in the search bar, click on troubleshooting.
c. Click on Hardware and Sound, click on Hardware and Devices.
d. Follow the steps from the wizard to run the troubleshooter.
Method 2:
If issue still persist try to check if Bluetooth Support Service is started or not. Follow these steps and check if the Bluetooth Support Serviceis started.
a. Press Windows Key + R, type services.msc, hit Enter.
b. Right click on the service named-Bluetooth Support Service.
c. Check if it is started, if not click on Start.
Method 3
If issue still persist you may try the steps provided in the following article and see if it works for you.
Using Bluetooth Devices (Windows 8)
For installing Drivers refer to the links provided below.
Hope this would help. If issue still persists post back with current status of your computer and result of the proposed suggestion, we will be happy to assist you.
Regards,