Administrator Has Blocked This Application From Installing

Administrator Has Blocked This Application From Installing

Case:

You’re trying to install a ClickOnce application and get an error message saying: “Your administrator has blocked this application because it potentially poses a security risk to your computer”:
Your administrator has blocked this application because it potentially poses a security risk to your computer


Cause:

The ClickOnce trust prompt is disabled on your operating system, so instead of a dialog (prompt) which allows you to either proceed with the installation or not, you just get the message above.

Solution:

You can change the trust pompt by editing the registry subkeys under:

\HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\.NETFramework\Security\TrustManager\PromptingLevel

There are five security zones for which you will need to edit the subkey.

Registry trustmanager promptinglevel

Each subkey can have one of the following values:

  1. Disabled: No trust prompt is shown, instead you get the 'Administrator Has Blocked This Application From Installing' error.
  2. ​Enabled: A trust prompt is shown..
  3. AuthenticodeRequired: A trust prompt is shown only for signed applications (other applications cannot be installed).  It is recomended to set each subkey to 'Enabled'.

Trust prompt example

      


You should now see the trust prompt option in the security warning.  

If additional assistance is still required after performing these steps, please call Verisurf Support at 1-888-713-7201

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