New Windows Activation Bug Is Downgrading Some Windows 10 Pro Licenses to Windows 10 Home

[Update]: Microsoft says only a limited number of Windows 10 users are affected

One thing that connects most of these users is the fact that almost all of them had upgraded to Windows 10 Pro using their Windows 7 or Windows 8 Professional keys. The Windows 10 Pro deactivation issue appears to be widespread, affecting users in several countries, including the US, UK, Korea and Japan. Even Insider community has reported the same issue.

In a statement to Wccftech, Jeff Jones, Senior Director at Microsoft, confirmed the activation issue and assured that the problem will be resolved soon.