So the desktop compter has a homegroup already set up but the laptop can't see it?
If so, please turn your both systems on and make sure the desktop is on its homegroup... then open your laptop network screen and take a screenshot of the display.
View attachment 31866
eg, mine for ref.
do you have two computers and two media devices? right click one of the media devices and configure your media center (
even just turning every thing off will do) then see if you have issues still.