Can I?
Can I?
Your system already had Windows 10 set up and a physical disc. You should be able to use that disc to install Windows on your new PC. Since you want to store your OS on an SSD along with your games, the included disc likely contains the necessary installation files. Just follow the instructions on the disc to complete the setup.
It seems like you're encountering an issue where activation might be required but isn't working.
Sometimes you might find yourself after setting up Windows on a new PC and using the software from the previous system. It could show that activation isn't complete. You can reach out to Microsoft support to have the code transferred, since these codes are tied to the hardware.
I'm not claiming it's impossible... usually those ready-made system licenses are OEM, meaning they're tied to a specific hardware part like the motherboard or hard drive. Using them on another PC would likely violate Microsoft's licensing rules. Legally speaking, you'd be breaking the terms. I might be mistaken, as it's been a while since I reviewed these details from Microsoft, but that's what I recall. Best regards!
On the same machine, it works. You might also try a disc if it's just a standard installation disc. However, I believe you're using a recovery disc, which means it needs an already installed Windows to run recovery operations. Or it could be an OEM version with drivers and extra software bundled. Ideally, you should make a clean installer USB.