ClickOnce not launching

Question

I've got a user that is not able to launch our ClickOnce application (there are thousands of users that can just fine). They are not receiving any errors nor does the ClickOnce installation dialog display. The only thing that happens when they click the button to launch it is a progress bar shows up in the bottom of the screen saying that it is downloading the url.

The application is .Net 2.0 (I don't reference any of the 3.x assemblies). The user has Windows Vista and IE8. I checked the ClickOnce cache and it is empty (no applications at all). What else should I look at?

Answer 1

Check that the user has the necessary permissions to install ClickOnce applications (although I would imagine that would throw an error). If this is a computer on the domain, login as a different user and see if they can install the ClickOnce application.

Answer 2

If it's not in the cache, that means, it has not been downloaded. I'd check the following:

• Does the user have some type of 3rd party firewall installed?
• Try a different ClickOnce app. For instance, Google Chrome installer is a ClickOnce app.

Answer 3

you have to look at the security settings for the browser. Did you try loading it in other browsers other than IE. Firefox should be able to prompt you to download the .application file. Try adding the site to the trusted sites Through tools->internet options->security->trusted sites and add your url there and see what happens.