Open powershell and run it as administrator.
Enter the following command
Get-CimInstance -ClassName SoftwareLicensingProduct | where PartialProductKey | select Name, ApplicationId, LicenseStatus | Format-List *Wait for what feels like days
Bam! The information you were looking for!
Thanks goes to Richard Siddaway: https://richardspowershellblog.wordpress.com/2014/04/13/checking-license-activation/
Not working?
Open an elevated command prompt and use the following command
wmic path SoftwareLicensingService get OA3xOriginalProductKey