Sounds like a virus to me. I do not know of any "update to menu sets". In fact as far as I know Maya does not do any kind of update checking what so ever and never has. This makes me suspect you most likely have some kind of compromised version of Maya.
Sounds like it's time to run malwarebytes and or reinstall your system and then check to be sure you have a valid version of maya.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675