it didn't even begin to occur to me until i was adjusting task scheduler, because it's been giving me some glitchieness, and while it isn't a long shot, i think this is the kind of trouble copmuter users don't expect to experience when they buy their pc.
in task scheduler there is a task scheduled, under bluetooth called uninstallbluetoothdevice. i don't know too much about host intrusion detection or r&d, but I do know that from a fibre optic or signal perspective, there is a certain amount of interaction and interference caused by signals of different bandwidth. you can probably infer that i was thinking you said your disc drive had uninstalled or wasn't appearing, when i happened to lookup the response and saw it was your network adapter. although depending on what all you're running in your little machine world and what kind of connectors you're using, their integrity; etc. i don't think it's far fetched.
i can't provide a largely technical answer, except to suggest the possibility that you have your signals mixed up, and task scheduler has responded to this, by first uninstalling your adapter, and whatever sequence would follow to make your adapter hidden i am less presumptive of, maybe turning off that task or disabling, might help prevent future trouble (depending how you came about the issue in the first place).
you can probably adjust the trouble in the registry hive under hkey local machine, but you'll want to research your trouble via a reliable engine first. i've also fixed similar disc drive trouble in the passed by messing around in the registry, and although it worked to no seeming trouble, from a computer user perspective it still makes me uneasy when i think about it because the registry is so cryptic.
as far as the answer regarding bluetooth, just something to think about I guess, when working with machines that rely on some form of signaling: lamprophony.
