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#11
Remember, like the Group Policy Editor, they are just GUI conveniences manipulating the registry, and in the case of the second, scanning for updates too. Nothing magical, but very very convenient. The 2nd is a very useful package, whilst the 1st does a whole lot more too.
I would just like to mention that over many years I have come across this issue on multiple occasions - On the majority of these issues the cause was mechanical rather than software related.
The whole system of the automatic switch over of the sound output relies on a switch in the audio socket on the Desktop or Laptop, when you insert the headphone plug into the socket the operating system is made aware of this change, and switches the output from the rear speaker socket, (or speakers in a laptop), to the headphone socket.
It may be worthwhile cleaning the socket manually if you are happy with this, also some drivers (mostly high end sound cards), will have an option on the driver settings to ignore this signal so both work concurrently, if present check this as it can be reset by a new driver.
Also if you are running one of Microsoft's standard default drivers. (this is usually a basic driver supplied by the manufacturer of the sound card or sound chip, to "get the user going", but unfortunately will often replace a perfectly good working manufacturers item as it's build date/coding is later ), which often do not include the switch control and usually default to not working as required.