Support Article
Cannot install Silverlight
SA-8462
Summary
While trying to install Silverlight from Silverlight.cab, installation fails with an "Installation Incomplete" error.
Error Messages
Installation Incomplete
Steps to Reproduce
1. Select the 'document now' option.
2. You see Silverlight Installation required popup.
3. Click on 'Download PRPC Silverlight prerequisites' icon.
4. You see SilverLight.cab. Run the included setup.exe file.
5. You get an install error that the installer was interrupted.
Root Cause
The root cause of this problem is in a third-party compatibilty issue.
Resolution
Before installing Silverlight, you need to set both registries - “AllowLaunchOfElevatedTrustApps” and “AllowElevatedTrustAppsInBrowser” to 0x00000001 (enabled) to allow Silverlight to run.
Published June 12, 2015 - Updated October 8, 2020
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