Why does my Visual Studio Setup Project launch IE when installation is complete?

I have this Visual Studio 2010 Setup Project for installing my application. On (clean) Windows 7 32bit installations, it starts Internet Explorer after installing开发者_Python百科 my application.

On my own machine (Windows 7 64bit), this doesn't happen. Do you have an idea what could be the issue here? The default browser on my machine is chrome. On the (clean) 32bit machines it is Internet Explorer 8...

Update: I have just installed Safari on the test machine and set it as the default browser. Now the installer doesn't open a browser window. When I set Internet Explorer back to being the default browser, uninstall my application, reinstall it: Bam! Browser window opens again :(

FIXED: I was stupid. Now I'm less stupid. All this from r78 to r79.

It is because you are opening microsoft.com because you copied and pasted code. Ok ok I have no shame, but it would be a shame for that bounty to go to waste (prepares to be voted down) ;)