Follow these steps to find out if you need a product key:
On Windows 8.1 or Windows 10, choose Start.
Scroll down through your apps and choose Microsoft Office – the tile with the Office logo.
In the window that opens, choose Activate.
Do one of the following:
More info.
On Windows 8.1 or Windows 10, choose Start.
Scroll down through your apps and choose Microsoft Office – the tile with the Office logo.
In the window that opens, choose Activate.
Do one of the following:
More info.
