Unity is an interesting development, but it’s very distracting to me so I wanted to disable it. However, quite a few instructions I found weren’t terribly clear. Basically, you need to login to Ubuntu after specifying to use Ubuntu Classic. If you are already logged in, simply log out. Once the user prompt is shown, click on the user name and then look at the bottom of the screen. The login type will be shown as Ubuntu. Click on it and then change to Ubuntu Classic. Now login normally and you’ll get the window manager layout that you are used to.