I am using a dell inspiron desktop which is installed with windows 7. Recently i have upgraded my windows vista operating system to windows 7 There are some Compatibility issues of Nero 9 with windows 7 . After the upgrade when i tried to install the Nero 9 with the help of my cd drive i was not able to do so. Then finally i had to download it from the Nero website and then register it using the registration key. please help me.