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#110
On this machine it looks like C: is (active, system, boot). It appears you have no separate system reserved partition.
You would restore C: as active and not replace MBR unless you knew it had been damaged.
Probably a different situation on your new PC.
Note: The MBR Macrium refer to is the real MBR and it is the first 512 bytes of your disk. It contains partition tables etc. Normally it is static in nature and doesn't need to be changed. It is not movable and does not exist on any partition.