A .iso file is a mountable image of a disk or DVD image. Right-click it, choose "Mount", and Windows will create a "virtual DVD" that will open the image and let you browse it. You should be able to find a file that suggests it is the installer (it may be named "Setup.exe"). Remember, Windows now thinks you have a CD/DVD and have mounted your .iso file -- you might also find an "Autorun.exe", which (if it were a real disk) would start executing when you "mounted" it.
Bob Schor
