To convert WMI dates to FILETIME or VT_DATE format or to parse the date into component year, month, day, hours, and so on, you must write your own code.
Set dtmInstallDate = CreateObject( "WbemScripting.SWbemDateTime" )
Set wmiService = GetObject( "Winmgmts:root\cimv2" )
Set os = wmiService.ExecQuery( "Select * from Win32_OperatingSystem" )
For Each itemOS in os
dtmInstallDate.Value = itemOS.InstallDate
Print dtmInstallDate
Print dtmInstallDate.GetVarDate
Next



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