Search notes:

%SystemRoot%\System32\spp\store\2.0\tokens.dat

The system license policy file. It is a digitally signed file that contains key/value pairs.
In Windows 8.1, the file was located at %SystemRoot%\ServiceProfiles\LocalService\AppData\Local\Microsoft\WSLicense\tokens.dat.

See also

The value ProductSuite under the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions

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