I bought an episode of family guy from itunes but whenever I try to upload it to my ipod nano it tells me I can't sync it because I am not authorized to watch it on my computer HELP?

you probably didn't authorize your laptop. reinstall iTunes and then there will be a pop up that says you need to authorize the computer. click on authorize

I have a desktop not a laptop but it doesn't matter now cause I fixed it months ago anyway but thanks for the advice