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gsz2020's avatar
gsz2020
Copper Contributor
Jul 23, 2026

Windows 11 Pro OEM License Invalid After BIOS Update

Hello, A few days ago, I updated my motherboard's BIOS, and afterward my Windows could no longer be activated. Before the update, I couldn't find my original Windows box, so I followed a YouTube gu...
device management
licensing
Update management
Jamony's avatar
Jamony
MCT
Jul 24, 2026

The key shown in the Registry or by licensing commands may be a generic default key, not the unique OEM key injected into firmware, so its rejection does not prove the installation was counterfeit. The BIOS update may have changed the hardware identity used by activation or affected access to the firmware key. Confirm that the installed edition is Windows 11 Pro, sign in with the Microsoft account previously linked to the digital license, and rerun Activation Troubleshooter. If no eligible device appears, enter the original product key from the box, certificate, receipt, or retailer record. Do not use the key shown for the duplicate PC entry. Because an OEM license is tied to the original device, unresolved firmware-key or entitlement problems require the PC manufacturer, seller, or Microsoft activation support to validate the purchase. Keep the receipt and BIOS update details; do not buy another license before that validation.