Unlike so many other unresolved issues with Windows 10 in the past month, this one shouldn't cause you undue stress. Mine is a new laptop this year, upgraded within a week from Home to Pro. UPDATE: One of my Twitter followers says he was affected by this bug on a new laptop that was upgraded from Windows 10 Home to Windows 10 Pro.īecause your article just stopped me from panicking, I'll let you know that it doesn't only affect those upgrading from Win 7 or 8.

There are dozens more of these comments rolling in across social media and forums, but the common thread seems to be that these users had prior Windows 7 or Windows 8 Professional keys before upgrading to Windows 10. The deactivation and downgrade issue seems to be occurring in several countries including the US, UK, Japan and Korea. Need to deploy to clients but they wont activate. 'Same issue on Dell computers running Windows that we just bought. A reboot got rid of the water mark on the desktop but system info still says windows is not activated.' My second PC with windows 10 home is unaffected.

100% legit pro key that was upgraded when windows 10 released.

Windows is deactivated because I went from Windows 10 Pro to home and it doesn’t match anymore.' It’s even gone as far as my digital entitlement is gone from my Microsoft account and I have a Windows 10 home key now.

Downgrade to windows 10 home from pro