Dell Inspiron 1525 Auto Reboots

[gold_finger]

gksu leafpad /etc/X11/xorg.conf

When I do this leafpad opens but it opens (xorg.conf) and the page is blank.

That's correct.  The command will create an xorg.conf file located at /etc/X11 in the file system.  I (and others who've used Linux for a while) automatically refer to files by their full path names.  That is something that confused me too when I first started out in Linux a while back.  Nowadays I forget that little things like that aren't clear to people newer to using Linux.  In this case, that command creates the file in the same way as if you had opened the file manager and went to File System (/) -> /etc (folder) -> /X11 (folder) and then created a text file called xorg.conf in that location.