Hello every one
I am running a Mac OSX 10.8.4.   Quite often when I have a page on the desktop be it mail, word or web site it will shoot of to the right or left out of sight for no obvious reason.  Is there any way I can stabilise  the problem.
One other thing that I think may have a connection. I used to be able to have four pages on screen, one in each corner. Not sure if I have lost the app or it's just hidden away some where.

Can any one help with this please. arram.