Hi, you can extract it from the registry. Navigate to:
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Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform
BackupProductKeyDefault
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Here's a video if you like more details:
youtu.be/4Nj_MeDRjmI?si=MGO33yJyiAdbiRB4&t=175
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Thanks (I am not the official support)