ASROCK Z170M OC Formula Manual De Instrucciones página 209

In this step, please particularly pay attention to the Index number in the first command.
Index represents the different versions of Windows® 7. Please check the followings for the
versions you use:
Index : 1 Windows 7 HOMEBASIC
Index : 2 Windows 7 HOMEPREMIUM
Index : 3 Windows 7 PROFESSIONAL
Index : 4 Windows 7 ULTIMATE
Step 12
Use a program that can create and modify ISO files, such as UltraISO, to copy the modified
"boot.wim" and "install.win" files to the same directory in the Windows® 7 installation disk
and cover the original files. (We recommend backing up the original version just in case.)
Save as a new ISO file, and then burn the CD or USB which can be used to install.
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