DVD Burner not responding

People,

Suddenly the burning part of my DVD burners is not recognized, but DVD’s will play. I thought it was my HP burner and got a Sony and having the same problem, therefore I think it is the computer…PLEASE HELP!

Surely not.

Use an updated real burning program.

chef,

  I am using up to date real burning programs, DVDXCopy, NERO, Roxio......Everything worked fine before.  Roxio Drag to Disc box says no recorders.  But I can play DVD and apps fine.

The Packet-writing software installed and the many of burning apps is maybe the real problem here.
Is the IMAPI burn engine disabled?
What other Packet-Writing software is installed (eg InCD, DLA…)?