The PJ speakers are already disabled and do not play when the PJ starts, only the WDM gets "broken" and when I play anything there is no sound as the WDM isn't working and the PJ speakers are disabled. The PJ speakers do not automatically enable.
I went into the sound panel and checked and the PJ speakers appear twice when I click "show disconnected devices", there is also two "Digital Audio (HDMI)" which are disabled, don't know what that is as I've never used audio over HDMI, only whatever the PJ gets when I connected it the first time after which I disabled it. All four of the disabled options have "dont use this device, disable" under properties.
I will go into Device Manager and do what you said when I switch on the PJ next and report back.