Thank you for your post.
According to the data sheet found here:
http://www.lenovo.com/products/us/laptop/ideapad/y-series/y480/Y480_Datasheet.pdf
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
It appears that there is no Intel® wireless display software installed, and the graphics is Nvidia* based, which rules out Intel® wireless display from functioning (it work only with integrated Intel® graphics)
For Intel® Wireless Display to work it must be pre-installed by the laptop manufacturer, so they would actually advise if the laptop supports it,
Maybe I am have reading comprehension problems, but the link you mentioned says on the first page right hand bottom corner: "enjoy... with intel wireless display"
secondly, if a laptop has a intel core i5/i7 chip, how does it not have integrated graphics? do you saw out that part of the chip contained intel HD graphics circuitry so that only nvidia will survive? 
the integrated graphics is by default, discerete extra is nvidia. read the cnet specs page:
as long as the intel chain of command is maintained:
intel core i prcocessor -> intel hd graphics driver (or combo/switchable) -> intel wifi card -> intel chipset
there is no reason why widi should not work on any machine.
please correct me if i am wrong.
Lenovo Y480 comes loaded with Intel WIDI and it works absolutely fine, however Laptop body does not have Intel WIDI sticker.
I have Y480, bought Netgear PTV200 and couldn't connect. It showed as receiving signal and attempted to connect but wouldn't. I disabled Norton just in case but no luck. I even called Netgear and they said if it didn't connect then so sorry...not meant to be.
If you know how to make it work, I'd be interested.
Thnx!
For me it worked right out of the box. I had 1 month McAfee antivirus but it never interrupted WIDI. I also have Netgear PTV2000. I hope you should check firmware of wireless router also. I have Wireless router of Netgear.
So, you have same computer? So, you think the wireless router has anything to do with it? I updated router firmware but no difference. The router is a bit older. I may try a new one before I call it quits...
