Windows not active any more

Luke 0 Reputation points
2026-10-14T16:12:54.59+00:00

Today when I got home I see my Windows requires activation.

Note: I've had this Key for 6 years and only needed to reactivate it around 3 or 4 years back when I replaced the motherboard.( I called in and spoke with a support staff member)

From what I know it is a KMS key and my error code is 0xc004f074

Using Win10 Pro 64bit .

Thank you in advance .

Windows for home | Windows 10 | Licensing and activation
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Answer accepted by question author
DaveM121 939.2K Reputation points Independent Advisor
2026-10-14T16:46:11.38+00:00

The error code 0xc004f074 does usually indicate that is a volume licence key, where did you get your Windows licence, was that pre-installed on the PC or did you purchase a full retail Windows licence from Microsoft or from a 3rd party retailer?

Or is your Windows licence based on a free upgrade from a previous Windows 7 or 8 licence?

2

Click your Start Button, type cmd then right click Command Prompt and choose 'Run as Administrator'

Run or paste this command and hit Enter:

slmgr.vbs /dlv

Please post a screenshot of the resulting dialog

3

Download the free ShowKeyPlus app from the Microsoft Store.

On the left of that app, click 'Check Edition', then enter your product key into that app.

Please provide a screenshot of that app window and please hide your product key in the screenshot.

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