you might try Glary Utilities - I liked it better than CCleaner.. just make sure to always click for the free version - I think some accidentally click for the paid version..
http://www.glarysoft.com/


Norton traditionally was heavy on the resources, I don't know if they changed anything.
I tried it when it came on a new pc. but it was not easy to figure out , the weirdest program I ever came across.. plus hard to remove if you don't like it..