When I click on "My Documents" I often then go to the Desktop by clicking to the right of a small window/bar at the top. It then opens up "Desktop", which is just above it in the"family tree". I click on "Desktop" to quickly go to it.
Suddenly this bar has disappeared. How to I get it back again, please?
Not sure what you mean. For me to go to 'my documents' in Windows 7 I click the start button, then (myname) at the top of the list on the right and in the window that opens I double click on 'my documents'.