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5 Rhenium

Re: Dual Boot Windows 8, 7

No, a GPT drive WILL boot if UEFI is disabled. What I'm not sure of is if the OS need to be installed with UEFI disabled. I had an OS problem and needed to disable UEFI before a Win 8 OS disk would boot in order to re-install Win 8 on a 2TB GPT drive. The UEFI was NOT re-enabled but no problem with booting to Win 8.

XPS M1530, Win 10 CU Pro 32-bit
Inspiron E1705, Win 10 CU Pro 32-bit
Dimension 9100, Win 10 AU Pro 32 bit
Inspiron 660, Win 10 CU 64 bit
Inspiron 3668, Win 10 CU 64 bit
Asus T100 Tablet, Windows 10 CU 32 bit

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