I have a Mac Book Pro which periodically runs really slow (ie it takes ~30 seconds to a minute to open applications and folders). Eventually, it will return to normal. Here are the specs: Processor: 2.16 GHz Intel Core Duo Memory: 2 GB 667 MHz DDR2 I've run TechTool Deluxe on it and everything checks out fine with the exception of the surface scan...program hangs up there and I have to skip it. I've also run virus scan and comes up clean. Any suggestions would be greatly appreciated!!!