The AutomaticUpdater is a .NET dll. It's likely either wyBuild was corrupted, your Visual Studio installation was corrupted, or you're using the wrong dialog box in VS.
Uninstall wyBuild, redownload the latest version, and try again.
Also, try turning off your virus scanner. Some virus scanners are completely braindead. (See: Is not a Microsoft .NET module While Adding ... )
How can i show you a screenshot? It's not possible to insert a screenshot in your textbox.
Just upload the image to one of the billion free image hosting sites. For example: http://imageshack.us/