M.2 NVME Boot Issues

[Mr_Gamesmith]

Good Morning All

I'm hoping you guys can help solve a problem that my wife is having.  

 

Recently I bought her a Kingston A400 M.2 Drive so that she could boot windows from this instead of her internal SSD, we got it all plugged in correctly (and even gave her case a clean) but when we started her up, the system refused to boot to windows (obviously because Windows isn't saved on the M.2...) but for some reason her BIOS wouldn't let her boot with any of her other storage drives, as it didn't even recognise that they were still plugged in and running.  Once we unplugged the new M.2 drive it all seemed to go back to normal and booted properly without having to go to the BIOS.

 

Can anyone help?  We're fairly au fait when it comes to computers but we recognise that we're out of our depth when it comes to this sort of stuff.

 

Much Obliged. 

 

Mr_Gamesmith