Norton 360 CD Doesn't Work in Windows 8

Hi

I bought Norton 360 and after upgrading my PC to Windows 8, put the CD in the CD Rom to install Norton 360 and it does not recognise the CD.  I checked in Windows explorer and it doesn't show the CD in the drive.

 

I have the licence key, can I download the program and then enter my licence key to activate it or do I have to take this disk back - the problem is that I bought it in a PC World store miles away from me.