PC wont boot without 2nd drive

[Tenma White]

I'm pretty sure I installed my OS in my M.2 SSD but when I removed my HDD my PC won't boot. It says no bootable, how can I fix this?

[CactusMan]

was the bootloader on your hdd?

[Stu_Bear]

Look in BIOS and point to the OS disk as the boot disk...or first disk to attempt to boot from anyways.

[CactusMan]

Although you point the uefi/bios to the os drive, the os drive may not have the boot loader.

The bootloader is data on the drive that points to your os for the system to boot. If you don't have a bootloader, then the uefi/bios wont know what to do with the other data on the drive.

Make sure your bootloader is not on the HDD or you're gonna need your HDD to boot.

Edited January 10, 2020 by CactusMan
Made more verbose.

[Tenma White]

Okay for some reason it now works without the 2nd drive but my PC sometimes goes to blue screen? but it just boots back up after like 1 minute. This happens like twice a week.