Granted my response was a bit rude, but there are three questions that irriatate me.
Q. Where can I download common software for free?
A. Google it!
Q. I need a serial for software/OS.....
A. Buy it!
Q. Asking about upgrades to Dell's/HP's/Compaq's
A. Go to the manufacture website! Vendors help site and forums are more suited for your particular brand.