I turned my grandkids loose on my computer recently
during a summer visit and now when I click on a username
box I get a string of about 20 different o;nes none of
which is mine.  I have to search though the list and
click on the one I use.  I'd like to get rid of the rest
of the names and just reset the system to use mine.  
Anyone know how to do this?  Thanks...Grumpy Grandpa