Fix We can’t activate Windows 11/10 on this device because you don’t have a valid license or product key., Error Code 0x803fa067.

Some Windows 10 users are reporting license issues resulting in warnings that their system is not activated. The issue surfaced in a Reddit post published yesterday, where other Windows 10 Pro ...

Windows Generic Product Keys allow you to install a specific Windows 11 or Windows 10 edition. They are also called default keys, but do note they do not actually activate Windows.

Windows remains functional without activation, but you'll be locked out of personalization and other non-essential features until it's addressed.

A glitch with Microsoft’s activation servers appears to be disrupting many users’s PCs, as Windows 10 erroneously reports their systems as either un-activated or downgraded from Windows 10 Pro ...

Microsoft will stop old Windows product keys from activating new Windows installs Windows 7 and 8 keys still seem to work for now, but that may be ending.

Microsoft has confirmed that Windows 7 and 8 keys can no longer activate any Windows 11 edition or version, not just Canary builds, as reported in September. However, Windows 10 keys are still valid.