Hey guys. So I'm a total computer noob so I don't really know where to start here. I bought my macbook brand new in september. It's run awesome until the last month or 2. Internet will run super slow. If I try to load a page or even start safari it'll take like 5 minutes to load. Some times it'll be quick and other times it will be super slugish. I also have a little over half my memory used up. Would that be a problem? Is there anything I should delete, run a scan for "add ons" or useless extras? I'm also running norton anti virus. Who recommends I keep this? I know macs are not prone to viruses but I've read a lot of places it's good to have just in case. Especially for ppl who sometimes use torrents n stuff. So how can I make my computer run smoothly again?