I\'m using Visual Studio 2008 SP1.
I have a Windows Forms application deployed internally using ClickOnce in a shared folder on the local network.
The test c
'Check Publish -> Installation Folder URL' and make sure it is not set incorrectly (sometimes it only shows up during publishing process)
'Check Publish -> Updates...' and make sure the Update Location is not set incorrectly.
To be absolutely sure set both these to be the same as the Publishing Folder Location. You'll need to tick 'The Application should check for update - Before the application starts'.
I had to do this to fix issue in my case.