Windows 10: Windows 10 Pro Deactivated

Hi

Recently I changed my Laptop and changed it's harddrive and RAM with existing one. Everything went well but my Windows 10 Pro is not getting activated. I also got activation message for Microsoft Office and that got activated without any problem but when my Windows is not getting activated.


I am getting following error on 'Activation' page


We can't activate Windows on this device because you don't have a valid digital license or product key.
If you think you do have a valid license or key, select Troubleshoot below. Error code: 0xC004C003


When I am clicking 'Troubleshoot' it is showing this error


We can't activate your copy of Windows. Make sure you're connected to the Internet and try again.

If you're connected to the Internet and continue seeing this problem, contact your system administrator for more information.


Will appreciate if anyone can help me in resolving this issue.

Thanks

Haroon

:)

 

deactivate to activate windows 10 pro

Hi Leslie,

It seems that you are referring to an upgrade from Windows 10 Home to Pro. Having said that, we suggest checking the article below on how to upgrade your brand new PC to Windows 10 Pro.

• Upgrade Windows 10 Home to Windows 10 Pro

You can always hit us back if you have other questions in mind.

Best regards.

 

MSFT acknowledges some Win10 Pro licenses being mistakenly deactivated

Source: Microsoft acknowledges some Windows 10 Pro licenses being mistakenly deactivated - Neowin

More:

• Windows 10 Pro goes Home as Microsoft fires up downgrade server - The Register
• Windows suddenly deactivated - Microsoft Community
• Windows 10 activation bug baffles, angers users | ZDNet

UPDATE: You can now run the Windows Activation troubleshooter to activate again.

*Arrow Use Activation Troubleshooter in Windows 10 | Windows 10 Tutorials

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.