> I have an Msi b250 gaming pro mother. > And selected GPT partition during installation.
I have an MSI motherboard, too. I have a lot of trouble getting Guix System to boot. One of the problems is SecureBoot. Debian and Ubuntu have signed bootloaders, but Guix System does not. If I recall correctly, simply disabling signature checking in BIOS was not the solution. I think the solution was to select something like "Windows 7 Installer" from the list of pre-supplied keys in the BIOS. Please do not take this information literally because I do not remember the details. The second problem was the BIOS setting with options like "UEFI" and "LEGACY+UEFI". I found that the second option is really just "non-uefi only". I also found that the guix installation method for putting a UEFI bootloader in place does not work unless the computer was booted via UEFI. I hope this murky information is helpful somehow, Tomas. Cheers, --sebboh
