Question Odd symbols / glitched display in motherboard boot menu, possible malware?

[nurg1]

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

 

[Ralston18]

Try running the built in Windows troubleshooters. The troubleshooters may find and fix something.

Then try "dism" and "sfc /scannow".

https://www.windowscentral.com/how-use-dism-command-line-utility-repair-windows-10-image

https://www.lifewire.com/how-to-use-sfc-scannow-to-repair-windows-system-files-2626161

Failing that manually download the GPU drivers directly from the manufacturer's website.

Reinstall and reconfigure. No third party tools or installers.

Make and model monitor? If the monitor has its own drivers then reinstall them as well.