If you are trying to change (or upgrade) your Windows 10 edition, but are running into activation errors, here are the commands you can run in order to get activated:
1 - Open up your command prompt in elevated (Administrator) mode. Run these commands in this order, one at a time, WITHOUT the quotes! After each, wait a few seconds until you get a confirmed message before moving onto the next... okay here we go....
2 - "slmgr.vbs/upk" - this will remove the current product key.
3 - "slmgr.vbs/ipk YOUR PRODUCT KEY" - this will install the new product key, make sure you fill in YOUR PRODUCT KEY in the above area.
(Example: slmgr.vbs/ipk XXX32-XXX32-CCC32-BBB34-CCC87)
4 - "slmgr.vbs/ato" - this activates the product key.