The Intel WiDi app was uninstalled on my computer after the 8.1 upddate, and the "Add a wireless display" did not appear in Charms>Devices. I have just reinstalled the latest version of the Intel WiDi app (v 4.2.24.0) running on Windows 8.1, and the app is working (though a bit buggy), but still no recognition of the PTV3000 receiver in Charms>Devices. The app detects it, however. WiDi with the WiDi app is better than no WiDi at all.
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