I have come to the conclusion that it is impossible to configure this laptop to dual boot Windows 7 and 8.1, unless anyone knows better. The issue seems to be with the BIOS settings which appear to be mutually exclusive to booting either Windows 7 or Windows 8.x but not both.
Whether opting for a MBR or GPT configuration, or installing Windows 8 directly from USB media or within Windows 7...
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