Windows 10 Not Booting with Above 4G Decoding Enabled

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Ijaz.ahmad

Hi,I’m encountering an issue with Windows 10 on my Intel Core i7-8700 Coffee Lake system. When I enable the "Above 4GB MMIO BIOS Assignment" setting in the BIOS, my system fails to boot into Windows. Specifically, after enabling this option:Setup Utility → Advanced → System Agent (SA) Configuration → Above 4GB MMIO BIOS AssignmentThe system reboots, but I only see the rotating dots on the Windows boot screen, which get stuck after 1-2 complete rotations.Here are my current details:OS: Windows 10CPU: Intel Core i7-8700Questions:What could be causing Windows to not boot with this setting enabled

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