On the computer in the taskbar. It says that a new xbox has been detected.
Please double-click here to connect it to the computer. When you clicked the
button it take you to MCE but there nothing about xbox there and I dont own
one.
That generally happens with the extender. See if you are able to do this:
"When you click the message (don't just click the X to hide it), it should
open up a box to set up the xbox; in here there is a check box that lets you
check not to display notifications for that device again, just check it then
close the box."