Question Help With A New Build

[Newt.1]

Hi everyone and this is my first post on here.

Can someone help?
This is the system:

PSU - 500W SFX-L
Case - Silverstone SG13B
Motherboard - ASUS ROG STRIX Gaming Intel H470 - flashed to the latest update.
Processor - Intel Core i5 10400 Comet Lake. Not overclocked.
RAM - Corsair 16GB Vengeance LPX DDR4 2400MHz RAM/
Storage 1 - WD Blue SN550 1TB
Storage 2 - 8TB Seagate BarraCuda 3.5" HDD SATA III
Graphics - EVGA GeForce RTX 2060 KO Gaming
CPU Cooler - As supplied with the processor
Case Adaptor - Silverstone SFX to ATX
Case Fan - Noctua NF-P12
O/S - Windows 10.

I seem to have never ending problems getting it to boot.

First it seems "slow" to get started. Then I get the BIOS message. What settings should the BIOS be set to?

Then I get the Republic of Gamers logo with a constant spinning of a circle of white dots.

I should be expecting a lightening boot. I created a boot USB, installed to the M.2 and then nothing but problems. No booting and just the spinning dots. Sometimes I power it off, Windows says it will automatically repair and then still nothing.

 

[Newt.1]

Okay, I've taken out the Nvidia gaming graphics card and the 8Tb hard drive to get the build a bit simpler.

Now the PC gets to the login screen and Windows.

Looking in Device Manager there's some things with "!" next to it.

Some of it being PCI. So I've connected an external CD drive to the USB on the computer and installing the drivers that came with the motherboard.