I currently have an Asus Z77 motherboard and I want to upgrade to an Asus Z97 motherboard. I know usually you have to reinstall the OS, but if the new motherboard is Asus also, do I still have to?
If you have Windows 7 or below, then you won't have to reinstall the OS, but you will have to install all the drivers for your motherboard fresh (since the drivers are all different), and you may have to re-license your software if it is hardware bound.
If you have Windows 8/8.1, you will also have to reinstall all drivers, but you will not have to re-license your OS.
If you are referring to Microsoft licensing, then the answer is it depends. But if you meet the the requirements to can transfer to to new motherboard. Check out the website below.