The Windows 7 Pro SP1 installation ISO contains 5 installation options, but is blocked in the package and can only be installed with a professional version, and the following retrofit allows the retrofit ISO to be installed with optional 5 windows 7 versions.
Run UltraISO, open the Windows 7 installation ISO, delete the Ei.cfg file, and save As.
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With the retrofit ISO installation, you can choose from 5 versions of Windows 7
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Note: When using the Professional version of the transformation, the confirmation is not the Vol version, vol's Windows 7 installation ISO only one version, cannot be modified by the above method.
Retrofit Windows 7 Pro SP1 install ISO 5-in-1 simple method