Windows 10: Can't boot into Windows

Hello all, sorry firstly if this is the wrong section. I have a M.2 drive that has shown no problems to me, but I come to boot today and nothing. Top left blinking _ then moments later the system entered the BIOS. The M.2 in the BIOS boot menu is called "ROM MODE".

Not too sure where to go from here, hope someone can help me.

Thanks!

:)

 

Can't boot to desktop after making Windows 8.1 Operating system as default.

Old title: Can't boot

Hello: I have a 1 TB start up drive that has windows 7, 8.1 and 10 on it. I use to be able to boot and it gave me a choice of which windows to boot into but recently it has just started going directly to Win 10 and giving me No choice. I went into disk management
and made the win 8 partition active and now I can't boot into anything. is there anyway to change this back? Once again, I can't boot into any OS. I can't even boot into safe mode.

 

Can't boot into windows

Have you disconnected any external (USB) hard dives whilst you reinstalled Windows?

 

Have you gone through this guide? Access Denied You have also pulled all boards and checked for dust and reinserted. Go through the link I posted and see if that works. If any problems, hang tight and your post will be moved to the proper forum and then someone that knows more about the M.2 boards can help.