Hello, thank you for your post,
Some of the trouble of displaying the video remotely is the possible interference, if you use an actual adapter to connect to the TV you may try using WiDi while you move other wireless devices away or even turn them off. Also after you have done an update it is a good idea to disconnect the push to TV adapter from the power then plug it back in, also close the WiDi software in the meantime. this would reset the current connection.
Also check for updates of your media player, some of the tested ones are: Microsoft Windows Media Player*, Windows Media Center Edition*, Cyberlink PowerDVD*, Corel WinDVD*, ArcSoft TotalMedia Theater*.
If it has been some time since you last used it then it may be caused also by other updates or even changes in the network now causing interference, you my try doing a system restore to a previous date, see the link below for instructions for the system restore:
System Restore - Microsoft Windows
NOTE: This links is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.