I have a 2.5 GHZ Macbook Pro purchased in July of 2008. So far, it's been the best PC I've owned. However, my Macbook Pro has been giving me the pinwheel of death on the most mundane of tasks, and every application is slow. I even had firefox crash on me 5 times when the only thing I was running was firefox. File transfers are even much slower than they used to be. The ONLY thing I've done was I installed 4 GB of Ram from Crucial (up from the standard 2 GB). My Macbook Pro sees the 4 GB of ram and is (obviously) running, albeit much slower. I'm going to reinstall the factory Ram and see if things go back to normal. Aside from that, what could be causing the slowness? It's so slow I can't stand to use it.