This error code Means you are using windows 10 home and want to upgrade windows 10 home to pro. or You upgraded to Windows 10, but the activation servers were busy, Or Your product key is not valid. Tricks: you can buy windows 10 pro product key only $27.99 from softkeworld
when you buy windows product key from Microsoft that will be worst because you need to pay full price. however i have bought a product key from softkeyworld only $27.99 then it's worked fine without any issue. i don't know what's a different with both product key. because softkeyworld are cheap...
youtube have own server and cloud and it's most powerful video sharing platform beside others website don't have powerful cloud , bandwidth and many more things.