The Software Licensing Service reported that the license could not be found or was invalid. The error code usually means that the user entered the wrong license key ...

Microsoft officially ended telephone activation for Windows on December 3, 2025, requiring users to activate through an online portal instead. PCWorld notes discrepancies between Microsoft’s actions ...

Recently, there have been discussions and speculation that Windows cannot be activated by phone. When attempting to do so, you receive the message that this is “currently” not possible. Microsoft ...

Microsoft has quietly shut down the last official way to activate Windows by phone, a change that lands hardest on people who work and travel in places where a stable internet connection is never ...

Microsoft has ended its phone-based activation for Windows and Office, pushing users to an online-only system requiring a Microsoft account. This change, discovered by a tech enthusiast, impacts older ...

Windows Activation Error Code 0xC004B100 commonly occurs when you try to activate your Windows version maybe after replacing either your motherboard or CPU. If you ...