I have stupidly 'cleaned' up my computer, and in doing so, deleted a copy of Apple Application Support and one other Apple download whose name I didn't remember.  It was probably needed in conjunction with the other one to function.  I use these on my Windows XP computer to watch Quicktime movies, which my Nikon Coolpix L11 camera takes.    I cannot for the life of me figure out where to go or how to download the Apple Application Support or how to figure out what other file had to be downloaded now.  I try and try, and although I click on download, nothing seems to happen.  OR, maybe I have it downloaded, but it doesn't work alone.   I downloaded Quicktime Player, thinking that it would allow me to play the Quicktime movies I had taken last night.  That doesn't seem to function.  When I try to play the movie, I get a message to download Apple Application Support.  Infinite loop kind of thing.   Can anyone help me figure out how to download what I need to play these movies?  I promise, I will never clean out files again!    Myra Herron