Windows 10 oem key and reformatting

[marcokristensen10]

I currently have a windows 10 pro oem key activated on my pc and i was wondering if i reformat my pc will i need to buy another key or can i just reuse the key when i boot my pc with the windows 10 iso that i installed on my iso. I was just wondering cause an oem key ties to your motherboard.

 

[USAFRet]

I currently have a windows 10 pro oem key activated on my pc and i was wondering if i reformat my pc will i need to buy another key or can i just reuse the key when i boot my pc with the windows 10 iso that i installed on my iso. I was just wondering cause an oem key ties to your motherboard.

Are you doing this in the same system?
If so, no problem.

Otherwise:
Read and do this before you change any parts:
https://support.microsoft.com/en-us/help/20530/windows-10-reactivating-after-hardware-change
http://www.tomshardware.com/forum/id-3164428/windows-build-1607-activation.html