
This does not necessarily indicate that the key you have is no longer valid, as the error message suggests. It turns out that Windows 10 or 11 is not accepting the product key made of 25 characters. But several users have reported Windows product key not working instances. The product key helps activate Windows and ensures that it’s a genuine copy, not registered on more devices than permitted.

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This is not a Sony decision, rather a restriction imposed by Microsoft.Home › Fix › Windows 10 › Windows 10 Product Key Not Working: 8 Ways to Fix This Sony does not have product key information to provide. IMPORTANT: If the product key has been lost or forgotten, you will need to contact Microsoft at 1-800-Microsoft for the appropriate product key. If you purchased and downloaded software from Microsoft using the Add Features option, the product key can be found in the original email sent to you from Microsoft after purchase.

If you purchased software or operating system upgrades using a retail channel, the Key Card that came with the product will contain the appropriate product key. If a complete system recovery is performed, the computer will be returned to the original factory condition and you will need the product key and install media in order to reinstall any upgrade pack. If an upgrade pack has been installed on a VAIO computer with Windows 8 preinstalled, such as the Windows 8 Media Player or Windows 8 Pro version upgrade packs, and the operating system is reset, you will be prompted to enter the product key for the upgrade pack.
