You can bind Win-B to tether Bluetooth.

1. As suggested by Techie007 you can create a shortcut by going to "Devices and Printers" right-clicking the phone and selecting "Create shortcut".

2. Put the shortcut in a directory like "C:\Windows\BluetoothLink" by itself

3. Install Autohotkey

4. Right click on the Desktop, and choose "New" -> "AutohotkeyScript"

5. Enter the following:

   #NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
   SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
   
   #B::
       SetKeyDelay, 200
       Run, C:\Windows\BluetoothLink
       Sleep, 300
       Send, {Down}
       Sleep, 200
       Send, {AppsKey}
       Sleep, 550
       Send, {Down}
       Send, {Down}
       Send, {Right}
       Send, {Enter}
   

6. Save the Autohotkey script (e.g. Ctrl-S)

7. Double click the Autohotkey script to run it

8. Press Win-B, test that it works

9. Open your startup directory (e.g. press Win-R and type "shell:startup")

10. Make a shortcut to the Autohotkey script (so that it works even after reboot).

One could perhaps make this fully automatic by scheduling a task on resume but I am not sure I would recommend fully automatic Autohotkey scripts stealing control of your keyboard from you. They tend to be a bit fiddly even when run manually.

You can bind Win-B to tether Bluetooth.

1. As suggested by Techie007 you can create a shortcut by going to "Devices and Printers" right-clicking the phone and selecting "Create shortcut".

2. Put the shortcut in a directory like "C:\Windows\BluetoothLink" by itself

3. Install Autohotkey

4. Right click on the Desktop, and choose "New" -> "AutohotkeyScript"

5. Enter the following:

   #NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
   SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
   
   #B::
       SetKeyDelay, 200
       Run, C:\Windows\BluetoothLink
       Sleep, 300
       Send, {Down}
       Sleep, 200
       Send, {AppsKey}
       Sleep, 550
       Send, {Down}
       Send, {Down}
       Send, {Right}
       Send, {Enter}
   

6. Save the Autohotkey script (e.g. Ctrl-S)

7. Double click the Autohotkey script to run it

8. Press Win-B, test that it works

9. Open your startup directory (e.g. press Win-R and type "shell:startup")

10. Make a shortcut to the Autohotkey script (so that it works even after reboot).

One could perhaps make this fully automatic by scheduling a task on resume but I am not sure I would recommend fully automatic Autohotkey scripts stealing control of your keyboard from you. They tend to be a bit fiddly even when run manually.