Hey folks, I'm hoping to get some advice on a recent problem. Any advice would be greatly appreciated! I have a 15-in, Early 2011 MacBook Pro, 2 GHz i7, 8 GB RAM, OSX 10.9.4 About 6 months ago I was getting sick of my machine running a little slow and the battery was completely consumed (I could get 20 minutes without the power adapter), so I ordered a new Crucial SSD and Anker replacement battery. WOW! It was like I had a brand new computer. Everything ran great and I was back to at least 3 hours of battery life. However, over the last 3 months, my battery life was decreasing quickly. About a week ago I contacted Anker Customer Support and asked them to send me a new battery for warranty, because I was only getting 45 - 60 minutes of usage on my computer from the battery. I also noticed that my fan was running a lot, but my computer did not seem to be overheating, it was keeping cool. I put in the replacement battery on Friday and now my computer is running with a ton of lag. I have lag as I'm typing this message, in fact, which is not good at all. I have also noticed that my fan never runs. My computer is not overheating at all, in fact it's as if something is holding back the processor and forcing my computer to run slowly so that the fan will not have to run. I have tried messing with the Energy Saver settings, resetting the SMC, resetting the PRAM, any trick I could find, but nothing seems to help. The next step I can think of would be to wipe the drive and restore from Time Machine backup with the latest Mavericks version. Before I go to that drastic and time-consuming measure, is there anything else I could try?