I have Norton 2010 installed on my computer with now only 3 days remaining. I purchased Norton Internet Security 2011 and successfully installed it on my lap top but when I tried to install it on my computer it got as far as rebooting and then I obviously pressed the wrong key because instead of installing I was given a product key in case I need to reinstall! When I check Norton I still have only 3 days left on Norton 2010? What am I doing wrong?