System won't boot after converting main disk to GPT, unless I disconnect secondary disk which is MBR

  • Thread starter Thread starter Max Headroom1
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Max Headroom1

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Hello,I have a PC based on Gigabyte B550M DS3H, Rysen 5 3600, 16GB RAM.System disk is a 1Tb Samsung 970 Evo Plus SSD M.2 NVMe and there's also a 4Tb WD Red SATA for storage.Motherboard and SSD have latest firmware installed.OS was Windows 10 64-bit; I thought it was a good idea to upgrade to version 11 but my system didn't meet the requirements, as main disk was MBR and TPM/Secure boot were not enabled. So, I went on and: 1) converted main disk to GPT, using Microsoft's MBR2GPT tool, as described here: https://www.easeus.com/partition-manager-software/convert-mbr-to-gpt-gpt-to-mbr-using-cmd-wi

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