Question Windows Boot Manager not appearing in boot options for my SSD

[Tomdam]

Hi guys,
I’ve ran into this issue where the windows boot manager for my SSD is not appearing in my boot options. And because of this, I can’t boot windows.

My boot options are:

1. P0: Intel SSDSCKKW240H6
2. P4: ST2000DM006-2DM164

Whereas previously I had

1. Windows Boot Manager (P0: Intel SSDSCKKW240H6)
2. P0: Intel SSDSCKKW240H6
3. P4: ST2000DM006-2DM164

If I try booting using P0: Intel SSD, I get the following “Reboot and select proper boot devise or insert boot media in selected boot device and press a key”

The weird thing is - once I swap out my SSD to my spare one (both have windows
installed), the windows boot manager appears again and will boot fine. But after restarting the PC, it will lose the windows boot manager again and thus cannot boot.
So I don’t think it’s an issue with the SSD itself since they both have this issue.

Would this be an issue with the motherboard? And any potential fixes which you guys might be aware of?
If you need any additional information, please let me know. I

MOD RETRACTED

I’m running Windows 10 home
Motherboard: Gigabyte Aorus Z270X-Gaming k5
Ram: 2x8GB Corsair Vengeance LPX
SSD: Intel SSD5 540s series, 240gb
Processor: Intel i7-7700k 4.2GHZ 8mb
Graphics Card: Gigabyte GeForce GTX 1080 Xtreme Gaming Premium Pack 8GB

 

[Barty1884]

Did you change anything in the BIOS recently? Enable/Disable CSM, or Secure Boot, by chance?

 

[Tomdam]

Did you change anything in the BIOS recently? Enable/Disable CSM, or Secure Boot, by chance?

No, nothing had been changed. It just started blue screening one day and then this booting issue started.
All the bios settings have been kept as default