Clickonce App Doesn't start with Windows 1803

Question

I have a Clickonce app from Visual Studio 2015 SP3 that is published to the network server and used in-house only. The program works just fine when launched from Visual Stud

Answer 1

It appears as though some subsequent Windows Updates have fixed the issue on several of our PC's that were previously experiencing the issue.

Check for the updates listed here. https://www.catalog.update.microsoft.com/Search.aspx?q=KB4338548

Running winver.exe will show you which build you have.

Answer 2

After running in the same problem, I just found that my application was going to halt after a stupid uncaught exception.

Despite the fact that the image below is in Portuguese, Event Viewer shows the right error cause.

In my case, was a corrupted settings file!

Answer 3

Yes, frustratingly I also experienced this today. Presumably a security update that they'll release another patch for given this is quite a pain for developers and users of small business apps.

Rather than disable Defender or SmartScreen I chose to add my deployment website to the Trusted Sites in Internet Explorer and that then re-instated the warning dialog and my app updated and ran as before.

Really annoying given the nature of the issue and how long it took to figure out, but at the same time I had to use IE today, which is a rare event nowadays.

Answer 4

This works for me...Warn doesnt warn anymore...