I have a computer with a Z270 Killer SLI/ac motherboard from 2017. When I open the boot menu the graphical display is glitchy, I need to mouse over the text to get it to display and there are 2 lines of Chinese symbols displayed. What could cause this? Aside from this this there doesn't seem to be any problem with the board, everything works fine. Just whenever I see it I get paranoid my bios got infected with malware. I flash updated the BIOS to the most recent version and it didn't fix the issue.
https://www.asrock.com/MB/Intel/Z270 Killer SLIac/index.asp
https://www.asrock.com/MB/Intel/Z270 Killer SLIac/index.asp
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