Hi Joe,
I know the problem is not my TV.
As i said i have now Intel WiFi 7260 AC with a i5- 4760K processor with Intel HD 4600. My os is Windows 8.1.
Intel site says that al this harware should work with WiDi/Miracast. And, yes, i tried install the HD drivers and 1000 other things. But this al is not working for me... AND again the hardware that i have must work with WiDi... So pls help me/us to solve this problem!