Hi, I have got 2 months old Mac Book Air 13". 10 days back it started giving too much noise(not sure if it comes from Fan, HDD, Processor etc) with deadly slow processing. Took telephone MAC help and visited Service Center , they found hardware Ok and re installed my Lion , it worked ok for 2 days and after that same issue. Then this time i updated with 10.7.3 , after first rest after upgrading it to 10.7.3 noise gone and speed was also good BUT tonight again the same issue. When this issue comes kernel_task goes till 388% CPU usage and % System Shows 85% under CPU tab Any Help Guys ?