sorry for replying so late.
I got the SSD to work in a HP laptop, got the W7 and MSO codes, so the SSD, which turned out to be a HDD after all, will serve as a backup drive.
Thank you for your answer.
Phillip Corcoran said:
You can't use the Windows installation that's on the SSD since it was installed with a different motherboard. You must reformat it and install a fresh copy of Windows from scratch when you've fitted in your desktop PC.
Yes, you can use the SSD for a dual-boot setup, or use it just for additional storage space.
Note: you can't convert a PC to dual-boot just by adding a hard drive that's already got Windows on it. It doesn't work that way and it's not as simple as that.