ok this is my first problem iv had with my mbp, i thought i would see if i could stop the whine by taking out the file called IOPlatfomPuginFamily.kext. In thinking it migh be why i was getting average battery life i decided to put it back, so, i clicked and drageed it back to the extension folder. now when i start my computer theres a quick ? mark that flashes when i boot and whne it starts up it says that file was installed incorrectly, as well as another file like it whihc i didnt touch. how do i fix this? is there away to recover the extensions folder without formatting my computer? this is my first mac and iv only had it for a week so try to answer in macnewb terms lol thanks for the help!