i can't find registered serial number …… need help find
Where to find my machine mikro mk3 Serial Number?
As I understand it then your device serial number should be on the bottom of the device on a serial sticker.
Since you refer to 'registered serial number' then that makes me think that you are referring to something account related in which case then :
First go to account profile page .
Then select 'Products and licenses'
Then select Manage Licenses'
And then select 'Transfer Your Licenses'
Then your hardware serial should show there if registered to your account !
.