My Norton Internet security vanished from my laptop

I was working on my laptop last night and noticed that my nortons internet security was not in the system tray. I looked, searched and googled and could not get my issue resolved. When i tried to download it would be stuck on download for hours. I even uninstalled and tried to download again and it got stuck on downloading again. Could it be that the windows firewall is on? I has it off but all of a sudden its on. Im gonna turn it off and try redownloading it again but i dont know if thall work.