/cpky only clears it. To uninstall use '/upk [Activation-ID]'. Code: Microsoft Windows [Version 6.3.9600] (c) 2013 Microsoft Corporation. All rights reserved. C:\Windows\system32>cscript slmgr.vbs /upk c06b6981-d7fd-4a35-b7b4-054742b7af67 Microsoft (R) Windows Script Host Version 5.8 Copyright (C) Microsoft Corporation. All rights reserved. Uninstalled product key successfully. C:\Windows\system32>cscript slmgr.vbs /dlv Microsoft (R) Windows Script Host Version 5.8 Copyright (C) Microsoft Corporation. All rights reserved. Software licensing service version: 6.3.9600.16384 Error: product key not found. C:\Windows\system32> Would uninstall a Win8.1 Pro gVLK. EDIT:::::::::::::::::::::::::::::::::::: Interestingly WMIC check and VBS for Keycheck still find Info : Code: =Microsoft(R) Windows Software Licensing Version 6.3.9600.16384======================= =Copyright(C) Microsoft Corporation. All rights reserved============================== Name | Arch.: Windows 8.1 Pro | x64 License Channel: Windows(R) Operating System VOLUME_MAK channel Edition: Windows(R) APPXLOB-Client add-on for EmbeddedIndustry EmbeddedIndust ryA EmbeddedIndustryE EmbeddedIndustryEEval EmbeddedIndustryEval CoreARM ProfessionalN Professional ProfessionalWMC EnterpriseN EnterpriseNEval Enterprise EnterpriseEval Current Build: 6.3.9600.16384 BuildLabEx: 6.3.9600.16384 SKU-ID: ec67814b-30e6-4a50-bf7b-d55daf729d1e Product Key: GCRJD-8NW9H-F2CDX-CCM8D-9D6T9 License Status: 0 = < UNLICENSED > Graceperiod: 0 mins = 0 hrs = 0 / 180 days Rearms: 1000 KMS Host ePID: (empty) KMS Host Adress: (empty) Port:(empty)