Bios won't boot from ssd

[GTXstore]

Hi! 

I changed boot drive, i took off the ssd, and out in an hdd, Just to check on that it was okay, the ssd worked fine, with windows 10 installed, but now, when i plugg it BACK in, i get an error from the bios: No bootable device. 

 

I have tried to set the drive to 1th boot option, and it will not boot into it. 

 

What can i do? 

 

Specs:

Mobo: msi h55m ed55

Cpu: i5 750

Ram: 12 GB hp

Gpu: gtx 960

[Kilrah]

What exactly did you have initially? If you had 2 drives then windows' bootloader may not have been on the expected one.

[GTXstore]

15 minutes ago, Kilrah said:

What exactly did you have initially? If you had 2 drives then windows' bootloader may not have been on the expected one.

I had windows 10 on my ssd, which i used daily. And i wanted to play som retro, do i tried out my win xp drive, after i was done, i plugged the ssd back in and it did not wanna start. 

 

I have tried more drives on my pc, and all of them worked. I tried the ssd on two other pcs and it did not work, can i fix the windows without formating the drive? 

I know the drive works, i tried it in an hdd case and it showed me all of my files

 

I had the ssd in my pc first