Do NOT copy the folders only the files within them
as indeed my good colleague rashaffer61 said
you do the Parallel installation and move the data over, then you make sure everything is working properly. Once all that is done you can then delete the old installation and everything boots to the new installation
rshaffer61 - SORRY typed and posted before your last was visible
You MAY BREAK the loop by entering recovery console and using the cmd prompt for a system restore point, but it is large IF, in my opinion, and you may end up worse off than you are now
I DO APPRECIATE that this does not help you NOW but this is the reason why a repair install on a new motherboard frequently fails
Changing motherboard is a massive hardware change, triggering hardware signature problems. Motherboard has new on board IDE/SATA controllers, on board USB is a different model and serial number, ditto for PCI controller, PCIe, networking, audio, etc.
Completely re-installing XP has the same effect of sysprep: re-reading anew all the hardware. The "Repair" function may do that, but with a new motherboard, the repair procedure see the system as a totally different computer and fails because 'Repair' means repair 'the original PC'
sysprep - as on the previous link I sent