As mentioned, when I try to alt + tab through my active windows/applications on ubuntu the miniature window which opens that you can tab through to select a different window is displaying beneath my open windows so it's difficult to see what I'm doing unless I first minimise everything and then select what I need.
Perhaps I have incorrectly configured something or need to change something.
I only installed Ubuntu a couple weekends ago and haven't made any real changes. My computer was a new HP Pavilion 550-219na Desktop PC, and it only has Ubuntu running on it.
Thanks if you are able to help!