Windows 10: product key not working upgrading to windows 10 pro

THE PRODUCT KEY YOU ENTERED DIDN'T WORK. CHECK THE PRODUCT KEY AND TRY AGAIN, OR ENTER A DIFFERENT ONE. 0XC004F050
I contacted the store I bought my computer from and they supplied me with a product key. It started to download and about 5 minutes in it encountered a problem and told me to make sure I was connected to the internet and try again in a few minutes and when I tried it no longer even attempts to download. Just this message "THE PRODUCT KEY YOU ENTERED DIDN'T WORK. CHECK THE PRODUCT KEY AND TRY AGAIN, OR ENTER A DIFFERENT ONE. 0XC004F050"

:)

 

Will Windows 8.0 pro upgrade key work?

The answer to that question is yes it will activate Windows 10 Pro. What it won't do, though, is trigger an upgrade from Windows 10 Home to Pro.

1. Install Windows 10 Pro - not activated. Enter Windows 8/8.1 Pro upgrade product key. It will activate.
2. Install Windows 10 Home. Change product key. Here a Windows 8/8.1 Pro upgrade key (and any Windows 7/8/8.1 Pro product key) will be rejected. Instead enter the Windows 10 Pro generic product key and the upgrade to Pro will be triggered. Now you have a non-activated Windows 10 Pro installed. Change product key again, enter the Windows 8/8.1 Pro upgrade product key and it will activate.

Now - this is all assuming that the Windows 8/8.1 Pro upgrade product key has not been blocked from automatic activation. What I don't know is if phone activation will work in that case - or if the user must actually install Windows 8/8.1 Pro and activate it via phone first. My Windows 7 product key (good for 3 license family pack) has been blocked from automatic activation and I have to call the recorded phone line every time.

 

Home to Pro Key not working

https://support.microsoft.com/en-us/...ng-home-to-pro

Upgrade using a Windows 10 Pro product key To upgrade from Windows 10 Home if you have a Windows 10 product key:

• Select the Start button, then select Settings > Update & security > Activation.
• Select Change product key, and then enter the 25-character Windows 10 Pro product key.
• Select Next to start the upgrade to Windows 10 Pro.

 

Can't upgrade from Windows 10 Home to Pro

Hi Bill,

Thank you for posting your query in Microsoft Community. We apologize for the inconvenience caused and will assist you in the best possible ways.

I suggest you to download and create an installation media for Windows 10 Pro form the link provided below:

Download Windows 10

After the installation media is created, suggest you to upgrade to Windows 10 Pro from the installation media. When the upgrade asks for product key, enter the product key purchased for Windows 10 Pro. If it does not accept, suggest you to skip the activation
step. After the Operating System is installed, suggest you to activate by phone by following the steps below:

• Press “Windows key + R” and type “slui 4” and press Enter.
• Select the Region from the list and click Next.
• Call the Toll-Free number provided on top and can activate via phone.

Hope this helps. Keep us posted on the status for further assistance.