You don't need to reinstall your win 10 below is the guide to link your win 10 license with online Microsoft account.

http://www.windowscentral.com/how-re-activ...hardware-change

Before you change your mobo. please make sure u uninstall old mobo software such as intel chipset, usb software, audio driver and etc.

Just to let u know u must has a legit product key of win 10 , win 8 or win 7 just in case if u fail to activate your windows using the above method u will need to contact Microsoft from the link below, they will used remote assist to activate your windows.

https://support.microsoft.com/en-us/contactus/

Just a tip after u have successful activate your windows, go settings , accounts, click Sign in with a local account instead (must have your microsft acc. username & password), if not u will locked out of windows if you don't have a internet connection or forget your password.

This post has been edited by DEz012: Feb 19 2017, 06:34 PM