There are many ways to let support make adjustments to your machine.
Teamviewer
JoinMe
GoTo

There's another we use often, but can't remember it.
Dang sometimers

Anyway, they may ask to use any number of methods, I'd likely ask them what to install first. Most install pretty quickly. They may not even need to take control.
That way you don't end up with un-needed remote access type software installed.
Why install unless needed?


Make your sound your own!
.. I do not work here, but the benefits are still awesome