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Our software generates a unique machine fingerprint which is used in our product's licensing.

The machine fingerprint includes the SerialNumber obtained using WMI from Win32_OperatingSystem (e.g. wmic os get SerialNumber).

Lately we have had a few customers reporting a failed license check due to a SerialNumber change after a regular win10 update (note: this is not an issue about updates from a previous windows 7/8/8.1 to a windows 10).

Example:

  • before update: 00000-00000-00000-ZZ938
  • after update: 0000-00000-00000-ZZ975

Shouldn't SerialNumber be a value that does not change over time?

Is there any other WMI property that I can access and uniquely identifies the OS?

user1987625
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    We've got the same issue. Did you already found more information why the serial number changes during Win10 updates? – Dirk V. Jun 10 '16 at 10:13
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    I can confirm for sure Win32_OperatingSystem.SerialNumber is changing on Windows 10 anniversary update, will it change for future major updates, I don't know but it is worth relying on 'it will change'. – Patrick from NDepend team Jan 22 '17 at 13:41

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