After I installed Vista 64 the only problem I am having is that my DVD Rom (Sony DDU1615) will only read DVD's at 5x speed. It reads cd's fine but not dvd's any help is apperiated. Thanks in advance.

First of all you check whether you have DVD rom or CD rom. Then check whether you have installed DVD rom software properly or else instal it  again and put your dvd disk into your drive. Check whether it reads or not.