On top of what Peer told you to look for: Forgive me if I'm wrong but I personally refunded your money for AnyDVDHD. At that time we were not so aware of a particular crack like the one likely causing your problem. Had I known back then I would have asked for a log before the trial ran out and then this would have been a lot easier. Since you do NOT have a valid license you won't get very far now trying to register AnyDVDHD. So let us know what you see hanging on that particular value name in the registry and we'll know a lot more.