VS 2008 MSI Error - Getting "1:", YES/NO - What does it even mean?

I have an application written almost entirely in VB.Net, which runs as a Windows Service.  However, for the limited task of UnZipping .zip files, I had a method which used some J# code. This application has a setup probject, and everything worked great with VS 2005.  

However, as soon as I upgraded to VS 2008 and .Net 3.5, while the setup project still creates a setup.exe and an .msi file, both of them now fail when I attempt an install.  The install begins, but I then get a singularly unhelpful pop-up. This pop-up contains only this: "1:", followed by two buttons, one letting me click Yes, and one letting me click No. That's all I get nothing else.  If I click No, the installation process halts and that is that.  If I click Yes, an instance of my web browser is invoked, and I am brought to this Web page:
http://msdn.microsoft.com/en-us/vjsharp/default.aspx

Thinking that J# must be the source of my problems, I re-wrote the method in question with VB.Net code (using the downloaded ICSharpCode.SharpZipLib.dll), removed all references to J# from all projects and solutions, removed the J# redistributable from my machine entirely, restarted my computer, and STILL I GET THIS SAME PROBLEM!!.

I have no idea what is causing this, and it is preventing me from creating an .msi to support deployment to a production system.

Can anyone please tell me what is going on here, and what I need to do to fix the problem?  

Thank you very much in advance.
skylar1Asked:
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skylar1Author Commented:
I do not have the detailed log file of the installation.

J# is NOT checked as a prerequisite in the Properties UI.

I have given up on this and just recreated a completely new setup project.

Thank you for your attempts, but I would like to withdraw this question at this time.
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Vadim RappCommented:
please produce detailed log file of the installation (http://support.microsoft.com/kb/223300) and post here.
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Vadim RappCommented:
Most likely, the installation has J# specified as prerequisite, and the question was supposed to be if the user wants to download it from ms site. Right-click setup project, open properties, click prerequisites, and uncheck J#.
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