|Almost but not all laptop makers provide some way to return the system to the as bought state. Some use a F key at boot. Some demand that you create a set of dvd's.|
See owners manual.
Dunno what norton you have. You could have run it as an admin user and allowed some virus or rootkit. Always use a standard user. Save one account for the admin user but you should never have to use it.
If the symptoms return in moments then consider warranty claim.
Hang up and live.