I (and MANY other people) had the same problem. Some people even reinstalled the whole system - and then it worked for A WHILE. But if you look at version 6 you see it is a very basic software. PowerDVD provided a lot of WORKING features at this time already. So I think the best thing is to forget WinDVD. There is a lot of software around with great advertisement - but not many really working. I guess this is the last stroke of Intervideo... I would not waste a Cent... So ask for a refund. PowerDVD 7 cannot be so far away anymore. Sad that they have such an easy game...