Windows 10 Version 1809 (Updated Sept 2018)

For this multi-edition Consumer media, use a product key specific to the edition in the list you want to activate. From the desktop, select the Start button > Settings > Update & Security > Activation. Select Change product key and enter your product key. If the key is valid, you’ll be asked to confirm the edition change, and Windows then performs it for you. Windows 10 Professional, version 1709 or newer, will need to be installed before using the Window 10 Pro for Workstations product key to activate the edition. Both Windows 10 Professional and Windows 10 Pro for Workstations product keys will activate Windows 10 Professional, version 1709 or newer media.