I have a vb.net 2005 application that I am deploying via Click Once deployment.On one particular user's laptop, the application install is failing and giving a "Application cannot be started.Contact application vendor." error message.The message box has a "Details..." button, but it is not enabled...so it's pretty much useless.The only prereqs for this application are the .NET Framework 2.0 and MDAC 2.8 and I have verified that both are installed on this particular machine.I tried installing it on my laptop and everything worked fine.

I've also tried clearing out the "cache" (under the /Docs and Settings/{username}/Local Settings/Apps/2.0/ folder) but this is a new laptop and the /Apps/2.0/ folder does not exist.

UPDATE - I've also tried installing the application with an account with Admin rights, but it still failed with the same error (and no details).

Well, I ended up creating a setup and deployment project for this application, and was able to successfully install it on this particular user's laptop. The only downside to installing it this way is that it won't go out and check for application udpates, so I'll need to revisit this user when an update is put out. I also noticed that even though I specified a folder under Program Files for the installation location, it dropped all of the files to the root of the C drive. I'm guessing this points to some folder rights issues.