About a month ago, Microsoft stopped activating Windows 10 and 11 with old keys of Windows 7, 8 and 8.1. Furthermore, the company stopped the free upgrade path, preventing those using versions prior to Windows 10 from updating to newer versions without paying for new ones license. 
But according to several reports, some of the company's customers lost Windows activation after changing computer components or after a information of the BIOS. What's worse is that digital licenses linked to Microsoft accounts no longer activate the operating system, forcing many to buy another key or resort to pirated activation methods. Note that Microsoft Support has confirmed that hardware changes will not disable Windows activation.
Bill Babonas, principal product manager of Windows, he confirmed to The Verge that the company is aware of the problem and is looking for possible solutions:
Microsoft is aware of these customer reports and is investigating. Customers experiencing technical difficulties should contact customer support.
You can check the activation status of Windows from Settings > System > Activation > Activation Status. If there's a problem, you can continue to use Windows 10 or 11 without it being activated for a while until the company fixes the problem.
