Having the same problem. When I had WiDi installed (old version) it would say reinstall the program. The new version would tell me it wasn't compatible.
*Intel i5-3579K CPU (Intel 4000 graphics) however, I do have a dedicated graphics card. Not sure if this is will cause a problem.
*Intel Centrino Advanced-N 6205 for desktop Wireless Adapter
*Z77 Chipset (MSI Mobo)