Long Delay Before Splash Screen Appears Prior to Windows Starting

This is an odd one I noticed a couple of days ago, and may have happened previously, but not certain as I just start it and do something else in the meantime, but it's usually only for a very short time.

In this instance, I powered on the laptop and was glancing over at it whilst doing other things in the room. After a time when I expected to see the Windows login screen, the screen was still black. At this point I thought that maybe I pressed the F12 or Delete button by mistake, so went over to start it again, only to see that the power light was lit. Around this time, the HP Omen splash screen appeared, followed a couple of seconds later by the Windows login.

I used Wintoys to see my boot time, and it 51.3 seconds. Checking it ever since, the boot times are around the 8.1-8.5 seconds.

I've checked the Event Viewer for Warnings and Errors, and this is what I get for the last three days (I didn't check further back), all the same. However, this is just Windows stuff, and the delay was prior to Windows starting, so is there any way to check the BIOS for debugging issues?