I had an issue with my install of an upgrade from Windows XP 32-bit to Windows 7 64-bit and thought I would share it here in case someone needs the help. - I upgraded by downloading the 64-bit iso file of Windows 7 Professional Upgrade - Used Windows USB/DVD Tool to create a Windows 7 DVD boot disk - Opened the VM config menu and changed the boot order to have the DVD drive first, unchecked the HD box - started up the VM and performed the Windows 7 install - re-started the VM and reinstalled Parallels Tools and Internet Security Running like a champ!