Open Local Security Policy
Expand Local Policies and click on Security Options
Set following parameters to disabled :
User Account Control : Admin Approval Mode for the Built-in Administrator account = Disabled
User Account Control : Run all administrators in Admin Approval Mode = Disabled
Do a Windows Logoff and Logon again.
The UAC shield on dsmgui icon should disappear.
When executing DSMGUI, the "User Account Control" dialog box should not appear and the drap & drop of files/folders onto Source SD Package folder is available.