Bought a mcbook pro 15" recently and all was working fine until a couple of days ago. It started when I was browsing the web using Chrome and it just suddenly crashed. Then it started to become really sluggish, with color wheel appearing almost everytime. Also, after Chrome crashed, i wasn,t able to play videos from youtube saying requires flash player, and so I did download. still didn't do anything. And on top of that tart up takes ages...like 5-10 minutes. At some point I did upgrade from 10.7.4 to 10.7.5 still i think it didn't help at all. Tried updating the JAVA environment, and I think it made it worse. Not really how to solve this problem, and reformtting would be the last option. I really need help, because i need to get this fixed so I can finish my freelance stuff. Thanks!