Tried all variety of commands, first response was your version is not supported.
FOr this second command i got below response
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C:\Windows\system32>cd %ProgramFiles(x86)%\Microsoft Office\Office16&cscript //nologo ospp.vbs /sethst:kms8.msguides.com >nul&cscript //nologo ospp.vbs /act
The system cannot find the path specified.
Input Error: Can not find script file "C:\Windows\system32\ospp.vbs".