Short black screen with white underscore before boot

[How2Kiwi]

Just after installing Windows 10 Pro, I boot up to see a BIOS looking screen for a half second before the Windows 10 loading screen. It's only there for a split second before booting, but is there longer when restarting rather than a cold boot. I have a custom built system with UEFI, so I'm not sure what's going on.

 

[popatim]

Sounds like a glimpse of the EFI shell. Nothing to worry about... until you cant get past it...
Consider it the built in command prompt for the bios. and the EFI bios is no longer just configuration data.
You can google for EFI Shell commands if you are interested in what can be done.

 

[How2Kiwi]

I'd there any way I can bypass it or make it unseen during boot? My previous Win10 installation never did this

 

[Colif]

look in your bios boot order, efi shell may be an option, put it below the boot drive, or if your bios has the option, windows boot manager should be top. You may even be able to disable it.

 

[How2Kiwi]

look in your bios boot order, efi shell may be an option, put it below the boot drive, or if your bios has the option, windows boot manager should be top. You may even be able to disable it.

The only option is my SSD, which is selected. Someone elsewhere mentioned something about integrated graphics. Might this be an issue? (I have a discrete GPU)

 

[Colif]

some uefi can still flash up a loading screen like the old bios do, i think its an option in settings to show post

what motherboard do you have?

 

[How2Kiwi]

some uefi can still flash up a loading screen like the old bios do, i think its an option in settings to show post

what motherboard do you have?

Yeah, but my previous installation with all the same hardware never did that.
Motherboard: Gigabyte Sniper Z170