Norton does a full scan every day and that option is no checked I it slows down my computer so so much Thanks
How are you determining it is a full scan? A full scan generally takes over an hour, depending on how many files are on your system. By default, Norton will do a quick scan in the background when LiveUpdate gets any new malware definitions downloaded. A full scan should not be running on a daily schedule unless you set that up. These LiveUpdates are run about every hour.
Any chance you have purchased the Anti Track product? There are reports here that that feature is slowing systems.