GWT, GWT Designer and Eclipse Plugin Issue

Question

I am learning GWT, so I am following this tutorial from Google GWT https://developers.google.com/web-toolkit/tools/gwtdesigner/tutorials/stockwatcher

In this I have to open a java file in design mode. There I am getting the error

java.lang.ClassNotFoundException: com.google.gwt.dev.shell.designtime.HostedModeSupportImpl

I installed GWT designer via zip file, unzipping it and extracting it in the plugins and features folder.

Is it correct way ? is that the reason why the java file is not opening in design mode?

Also, I am not able to install a new software in eclipse, See my question ->

Eclipse 3.7 Indigo-'Install new software' not progressing : GWT Designer

Answer 1

The cause of the problem was AVG Antivirus blocking the installation. Make sure you don't have an antivirus running on your computer that will block software installations on Eclipse.