Weird boot on M.2 unit

[Kalsier]

Well this is a long story, in case you want to read it, thanks beforehand for helping me.

 

Hello guys, something weird happened to me today and I don't know how to fix it. A few months ago I got a m.2 SSD from a laptop. It was brand new and nothing had ever been installed there (the laptop owner decided to use a common SSD). So I had this m.2 and I've never used it until today. I installed it on my main pc and when I booted it instead of starting on windows (which is in another storage device) it started on freeDOS. I restarted the pc and I entered BIOS. I changed the boot options, and when I restarted, same happened, it entered freeDOS. I made a boot override to not start on the M2, but the same happened. It started on freeDOS. 

I turned of the pc and took out the M2, and then it started on Windows as normal.

Then, I installed again the M2, but this time I booted the pc with a flash device to "perform" a clear windows installation. Once in there instead of installing windows I format the M2 using diskpart and then I reboot my pc. FreeDOS was no longer there, but it didn't start windows either. It send me directly to bios, no matter what I did, the end was exactly the same. So if any of you guys know how to help me with this problem I would really appreciate that. Thanks for reading and spending your time. And sorry for my English, I'm from Argentina so it isn't my main language. Hope you all have a wonderful day!