I am assuming that you have a new, unused DVD in the burner you select? Yes, it is a new unused DVD
Have you recently switched from a +R to a -R or vice versa? No, +R is what I normally use
Are you using good quality media? I use sony or memorex
Does Windows recognize your burners in device manager? Under CD/DVD I see my burner listed and that the devices are working properly, do not know what else I should check....I am able to burn a music cd using Windows Media player
Have you changed burners or otherwise changed the burners? No, I have not changed my burners, how could I check to see if burners have been changed maybe?