Is she or is not she?

Although the DVD's are inexpensive, but they are not recognized by all DVD burners. We have a 6-month-old PC, the DVD burner, the Intenso not recognize. The seller told me to update the software, but that also did not help! On the Mac I we went, but I can the DVD then played only on the iMac. According to a further demand was told that I should return it (postage?), But now I had already some described and after the tests on the other PC some were useless. So for me there any more Intenso in question !!