If you are reading this, you have likely just been greeted by a small but incredibly frustrating dialog box. You double-clicked an application (often a PS3 controller tool like SCP Toolkit or a similar Bluetooth driver utility), and instead of your program launching correctly, you saw the ominous red text:
sudo systemctl status bluetooth
: A common cause is a leftover "LowerFilter" in the registry that blocks the radio from starting. PowerShell as Administrator powershell bthps3 bluetooth host radio not found