I have A HP740i dvd burner. It will not play back Original DVD Movies. I checked the properties and the DVD Region is greyed out and it will not let me choose a DVD region. The message said that I have changed the Region 5 times and can not change it again. I did not change the DVD region I tried HP Support, but they were no help. How can I reset the DVD region on my DVD player? The dvd player was working fine until I downloaded Explorer 7 and than deleted it.