The file is ISO, and DOES NOT need to be unzipped. If you unzip it and copy files directly, the system can crash at random. You need to use ISO DVD burner software, that will handle creating the disk properly. Most recent versions of Windows, 8, 8.1, and 10 have a built in ISO burner... Or use the free ImgBurn software located at Download ImgBurn 2.5.8.0 - FileHippo.com Some assert that DVD-R work best.