Alright just tell me which drive you're using to decrypt the dvd and I'll look into it. I said to try because if the buffer is full even if it could read dvds beforehand it wouldn't be able to read it now.
Aah, I'm sorry, I don't know what the problem is. But I've had that problem too, and so have a lot of other people.
I'm guessing it's some sort of piracy protection software built in? At least, that's what the theory is... :[
Sorry I couldn't help >_<
Do you have problems with just this disk or does this happen with other dvds? It could be that the dvd buffer is full. It's hard to explain but this happened to me once too. I suggest you try another dvd on your PC and see if it can read it.