With Administrator user or user belonging to the Administrators group the drag and drop of files to source of SD Package is not allowed.
The mouse cursor appears as a barred circle :
And the dsmgui icon on desktop has the blue and yellow shield icon :
Client Automation - r14.x versions
This problem occurs if Windows User Account Control is enabled and an Elevated Administrator rights is needed.
When DSMGUI is executed following dialog box appear :
Open Local Security Policy
Expand Local Policies and click on Security Options
Set following parameters to 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.