I am a bit confused at the performance of my MacBook Pro, and wondered if anyone can help! I have both a MacBook Pro and a MacBook Air, the MBP is an 18 month old 2.4 GHZ i7 with 750gb HDD, 4GB RAM, 1GB dedicated Graphics, and the MBA is a 6 month old 1.8GHZ i5 with 256gb SSD, 4GB RAM and integrated graphics. For some unknown reason, when booting up ANY application, whether it's Safari, iTunes or Word (particularly any Office 2011 application), the Air starts up within 2 seconds, but the Pro takes at least 30-40 seconds to boot any application, again particularly any Office '11 application. Is there any explanation why?! Do I need an SSD in my MBP?? I expected that spending £2000 on an MBP would give me the instant-boot applications that my MBA has which cost 1/2 the price. Why is my MBP so slow?!