I have a Parallels Desktop 7 for Mac disk, and a Windows 7 Ultimate 64 bit disk as well. When I try to install it on my 2011 MacBook Air 1.7GHz core i5 4GB RAM 256GB SSD via my Apple SuperDrive, I keep getting an error about the DVD/CD Drive not finding the files or something like that...? It is apparently a common problem, but I don't have any idea how to go about correcting the problem so that I can install my Windows 7 on my MacBook Air? Parallels Desktop 7 for Mac is installed and activated. So what do I need to do to get Windows 7 Ultimate 64 bit installed properly? Can anyone help me with this please Thank you