Hi
Well the problem returned after installing version 10049.
I decided that you were probably right about it being something on the menu that was causing it.
After a little research I found a program called ShellExView.
It shows all the options on the right click drop-down menu and highlights the ones that are not put there by Windows.
http://download.cnet.com/ShellExView/3000-2094_4-145729.html
It also lets you disable and enable them.
I went through and disabled all the non Windows ones and the problem went away.
Tomorrow I'll start turning them back on, one at a time until I find what causes the problem.
I was surprised at how many programs add things to it.
Mike