It can read some discs, even burnt ones, but others it will not. The discs that it will not read, well some the other comps will read, and some will not. I have not tried burning with it, as that is not the issue I am having now. I did not verify all the discs, but all of them had completed their burn sucessfully. Could this be a software issue with my old comp, but even then, why do some work and some not?