@Tripplec , Its not the computer, trust me on this one, I bought a brand new Dell, had the same problem, returned it and bought an Asus, even better computer, both with Windows 8 64 bit, both did the same thing. The problem isn't fixed yet. I tried all the tricks the Gurus have posted and one got a little irritated with me, but having said that, it's still not working.
I can burn a Data disk in Roxio NXT but nothing in MyDVD..
I contacted Roxio and this is what they said!!
Thank you for contacting Corel Customer Support.
To be honest with you, we haven't figure out any exact solution for this one so we are suggesting any alternative workaround that might work. Since ISO is working, you can work with it until we figure out this issue.
Please do not hesitate to contact us with any further questions.
I'm hoping enough people complain so that they find a solution, it has something to do with Windows 8 -64 and Roxio NXT, NOT the computer.
Roxio 11 worked ok before the upgrade, so I may go back to that, the only problem is that when I went back to Roxio 11 on the Dell, it did something and I wasn't able burn there either.
Also be aware that NXT has a count..you can only install it 10 times, After that you have to get Roxio to reset the count... All my other programs see both of my drives, so its a problem with Roxio NXT... sorry for the bad news... I got a nice guy from Roxio to help me, so maybe when he comes up with the answer, I'll post it. It is frustrating.
Here is what you can do while we wait... burn an Image file in MyDVD istead of burning to disk, and download Active ISO Burn -its free and works good. It will produce the same effect as if you were burning to disk.
Hope this information helps. Jack