I won't get into any debate here. Folk have moved their builder's licenses to new PCs many times. Yes, you may have to call it in. Be sure to keep that OS purchase receipt.
What you can't move is say a HP OEM License if you change the motherboard to not exactly the same HP model.
Let's say I have this os installed on a machine.
The machine goes poof and I retire it and build a new machine.
Can I legally install the os on the new machine?
What does msft think about that?
"This OEM System Builder Channel software requires the assembler to provide end user support for the Windows software and cannot be transferred to another computer once it is installed."
Keep in mind only one machine will have the os installed.