I'm afraid you are in a bit of trouble here as you are clearly stating that the old laptop had an OEM version of Windows XP.
As a result the Windows XP itself was licensed specifically only to the hardware it came with (the sticker you mentioned)
Trying to get it running in a VM itself is already breaking that license even in the case where you would run the VM on that same hardware (at least in the case of Windows XP as it did not grant you to also install in Virtual Machines)
The virtual machine hardware is seen as different hardware (and thus the need to activate again)
Trying to move that VM back to physical hardware is only legal if you would put it back to the broken laptop.
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