Security Warning while installing or using the Windows Connector

End users may encouter an error message when using Microsoft ClickOnce applications, such as TruGrid Connector software:

"Your security settings do not allow this application to be installed on your computer".

Security Prompt

Usually, the TruGrid Windows Native Connector will fix the problem:
Download and install the TruGrid Windows Desktop Connector from here
If this works, then use the Windows Desktop Connector. If this does not work, see the next steps below.

The other conditions that may cause ClickOnce applications not to run are related to restrictions on the computer. Here is how to fix them.

Browser Site Trust: The ClickOnce Application works within the Browser Trusted Sites setting. Please use these instructions to add TruGrid sites to Internet Options Trusted Site. Return to this page to do the next step.

Registry settings: Due to restrictions, .NET software needs to be configured to support domains in the IE Trusted Site. This can be remediated by your computer administrator by updating the registry. For simplicity, please copy the information between the lines below into NOTEPAD on the target Windows Computer. Save the file as a .REG file. Right-click and MERGE the file into the registry. The screenshot at the end of this article shows the BEFORE and AFTER of the registry.
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Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Security]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Security\TrustManager]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Security\TrustManager\PromptingLevel]
"Internet"="Enabled"
"UntrustedSites"="Disabled"
"MyComputer"="Enabled"
"LocalIntranet"="Enabled"
"TrustedSites"="Enabled"
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For additional details about ClickOnce security, please reference this article from Microsoft.
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