Miracast on Windows 10

I am not a techie!

Bought Chromecast, followed directions, can't get e6430 to connect. Have the correct miracast opening screen up on tv set to windows . Laptop claims it does not support miracast. Yet it is a 3rd gen processor with intel graphics. Have set lattitude to search for new device but it cannot find anything other than existing phone, wireless speaker, wireless head phones and fitbit.

2 fruitless hours trying but no luck. Anyone see a problem?