These ISO's should work on any machine as long as you have a valid Windows 7 Product Key.

I've always bought at least one OEM copy of Windows, or purchased upgrade copies when a new version is released. I picked up three copies of the Windows 7 DVD set (x32 and x64) for $40 each on Amazon, and you can pick up ISO's of Windows 8 directly from Microsoft for $40 a pop.

http://windows.microsoft.com/en-US/windows/buy?ocid=GA8_O_WO...