Bought a internal burner, didn't work. Bought a external, that doesn't work either. When I go to i-tunes I get a pop up that reads; I-TUNES SET UP ASSISTANT WARNING! The registry settings used by the i-tunes drivers for importing and burning CD'S AND DVD'S are missing . This can happen as a result of installing other CD burning software. Re-install i-tunes. I re-installed i-tunes, didn't work. Went to device manager, shows the device. Have done all my updates. Please help!