I am running Windows 7 Pro. My DVD/CD drive (HL-DT-ST_BDDVDRW_CT30F) plays commercial CDs fine. And it can (usually) burn a CD from a file on my laptop. But it is never able to play the CD it just burned. Any idea what is going on? I say it can usually burn a CD, because often it does not even recognize that a blank CD has been inserted, and thus I cannot begin the burning process. But if I can burn a CD, when I insert the burned CD, the autoplay "box" shows that the CD is unburned and asks with what software I want to burn it. It has been a long time since I burned a DVD, but my recollection is that the "process" is exactly the same. Thanks.