My computer crashed and I installed my "Operating Systems Disc" to re-install everything on my computer. Well everything was fine for 3 weeks until today. I turned on my computer and a windows activiation screen comes on and says my product key for windows is wrong but its not! Everytime I enter it, it says its wrong and to re-check. I am entering the correct one, I know I am. Why is this happening?? It wont let me open anything but internet explorer or enter a new key!! Im about to scream I have way too much important stuff on my computer to lose everything Again please PLEASE help!!
Im typing it exacly like it says on my sticker


Im typing it exacly like it says on my sticker