On a Windows Server with RDS feature enabled, you might encounter an issue with Windows Update Coordinator being stuck at “Please wait while the application is preparing for the first use” during a program installation. This problem is very easy to resolve with Group Policy Editor (either locally through gpedit.msc or Domain Group Policy).
Navigate to Computer configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Application Compatibility and enable the setting “Turn off Windows Installer RDS Compatibility”.
After installing the program, I would recommend re-enabling Windows Update Coordinator by disabling the GPO setting or leaving it at “Not configured”.
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