bacwrds :
The laptop was gifted to me, its a old laptop from like 2008 (had win7 or 8). It was then upgraded to win10, so... time to check out those links
EDIT: Just checked out the links and im not sure what that has to do with transferring windows license between computers. Am I missing something?
OK, if it was an Upgrade from something else, you're OK.
Those links speak to linking your OS license (digital entitlement), to an MS account, rather than specific hardware.
Later, when you build your new system, it will fail to activate. This is normal and to be expected.
This is when you go through the Activation Troubleshooter. Which leads you to telling your MS account about the new system.
It will activate.
OH MY....wrong links...lol
Here is the correct info:
Read and do this before you change any parts:
https://support.microsoft.com/en-us/help/20530/windows-10-reactivating-after-hardware-change
http://www.tomshardware.com/forum/id-3164428/windows-build-1607-activation.html