My IE 6.0 allowed only one window open. Clicking a link with the right mouse button and open in a new window closes the old window. Also opening a new window with ctrl-N closes the old window.
I followed a link and the page asked me if I wanted to upgrade my shockwave. I did so and after that I had the problem.
I de-installed Shockwave but the problem still exists.
I ran adaware with a new definition but no effect.
How can I get rid of this problem?

