It's weird - there's a bit of a delay when doing things. Really noticed it from today. It's also making more noise than before. Bit worried. I'm a first time mac owner so I'm still getting to grips with it all. I'm not sure how to describe it other than bit jumpy/delay between tasks, clicking buttons, typing etc? Checked updates - all fine.Thought it was maybe just google chrome but seems it is the same for iTunes, safari, open office and general usage (finder etc) It's getting pretty hot too. I have a black desk (just incase that matters) Any advice/suggestions?