Hi guys, I bought my macbook in early 2007 and its a 2 GHz Inter Core Duo, 512 MB 667 MHz DDR2 SDRAM. I am getting to a point where thinks have become very slow. Should I buy a new macbook or upgrade more RAM and new OS Snow Leopard. Will that make a difference. I feel like safari has adware or some kind of virus. It keeps popping wierd websites and redirecting. Overall I feel the laptop has become very slow. The pinwheel shows up more often than not. Sow what do you guys suggest.