I have a Bluetooth speaker that I use on several of my devices. On my PC, if I leave the device connected when shutting off either it or the PC, when I turn on the speaker, the PC will turn on too. I have to disconnect the speaker every time I'm done using it, but I don't always remember to do this, and it shouldn't even happen anyways.

Allow this device to wake the computer is disabled and off. Fast startup is disabled in Power Options and the BIOS. Wake-on-LAN is disabled on the Ethernet device but not the BIOS. The motherboard doesn't have Bluetooth so it's just a tiny USB Bluetooth chip that doesn't have any exceptional software which doesn't have any power management options.

Are their any other settings or tools I can use to stop this from happening? Thanks!