1. Windows Logo Key + R and type in ‘diskpart’ (CMD will open)
  2. Type ‘list volume’ (you will see a list of all your partitions)
  3. Next ‘select volume [volume_number] (use the number in the ‘Volume ###’ section of the previous command)
  4. remove letter [drive_letter]
  5. ‘exit’

And thats it, you’re done. No more annoying recovery partition showing up.

To add the letter back at the future date you can follow the same method above but replace step 4 with:

‘assign letter [drive_letter]’