VHG is right - it's like selling the car because the ashtray is full
try this first
http://www.ccleaner.com/download
it's free
then be honest with yourself - do you need all those progs?
and should those 10000000 photos and MP3s be backed up and then removed from the machine
then check and defrag the disk
probably sorted!
if not - you should have either got a CD with the machine
or have the option to "reset" the machine by holding f8 or f2 or .... (look in thebook)
use whatever to rebuild your machine (but you will loose EVERYTHING - make sure you backup before taking the plunge)