Windows 10 won't load to login with USB3.0 card installed

I have installed two new (different make/model) PCIe USB3.0 expansion cards on my workstation. On every attempt to boot, at the end of the OS loading period (Windows 10 blue logo screen) Windows either hangs or displays a graphic message "your PC has encountered an error ..." and immediately shuts down. This happens when the OS has finished loading and the login screen should appear. I have tried both cards multiple times in both of the empty PCIe (x16) slots. Any suggestions? Thanks

ASUS M4A79 Deluxe MB with latest BIOS revision & four PCIe x16 slots
Radeon graphics card slot #1 & LSI SAS controller slot #3

Hi there

First thing to do is to ensure the MOBO supports those particular cards.

Then ensure the card is seated properly and correctly installed -- if the card isn't installed properly --you need to ensure it's pushed all the way in - sometimes needs a bit of force --not too much or you will break it or the mobo.

Actually I'm not a great believer in USB 3 expansion slots (unless the Mobo already has support for USB 3 built in with some ports on the mobo) as you will be limited to the Mobo bus speed which will be far slower than a dedicated USB 3 Bus available on boards that already have at least one USB 3 port.

Cheers
jimbo