[SOLVED] Disk shows up as connected in bios, but can't boot to it or select it

[AspireOne]

When I connect my disk, the PC doesn't boot to Windows from it, but shows a black screen with "Reboot and select proper boot device or insert boot media in selected device and press a key".

When I'm in bios, the disk is shown as connected to the SATA, but it's not visible in the boot menu.

It's not the disk's or cable's fault. I tried it with two HDDs and one SSD and multiple cables. Booting from an USB is not a problem tho. What could possibly be the cause? I'm hopeless at this point...

 

[jay32267]

"When I connect my disk "

Where did this disk come from?

Is it the only disk?

How was Windows installed on this disk?

 

[AspireOne]

"When I connect my disk "

Where did this disk come from?

Is it the only disk?

How was Windows installed on this disk?

It's the only disk, it comes from a different PC (with Windows 10). It was installed through the Windows installation media on it.

It's a fairly new SSD and it was running on the same Windows 10 as the current machine.

I even swapped disks with Windows XP on them in the past and it always worked out fine, and this is as compatible as it gets.

 

[jay32267]

"this is as compatible as it gets. "
Not really.
A clean install is as compatible as it gets.


"it comes from a different PC "
Do a clean install. on the SSD.