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@Stephen144 wrote:After replacement of the system board in my HP Prodesk 600 G1 SFF, the system no longer boots from the original GPT SSD. I get an error message, "GPT Formatted Disk, legacy boot not supported".
The bios version of the new system board is v02.77 date is 04/17/2019.
The PC booted fine from the GPT SSD before the system board was replaced.
Could it be that I need to revert to an earlier bios version to allow boot from a GPT formatted drive?
Any help appreciated.
Thanks
You need to enable AHCI and select UEFI boot if indeed, you have a GPT drive. Don't let Microsoft try to sell you a 2nd copy of windows. You should be able to activate you old copy.
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