Hello, I recently purchased a gently used MacBook. Running 10.5.8. The computer sounded and operating perfectly until I made the following software updates: MAC OS X Update Combined iTunes QuickTime Security Update 2010-007 Remote Desktop Client Update Airport Base Station Update iLife Support Java for Mac OS X 10.5 Update 5 Java for Mac OS X 10.5 Update 8 Safari FrontRow Airport Utility Now I have an annoying hum noise, that could possibly be the fan. I have run Disk Utility, but the annoying hum noise remains. Does anyone have any suggestions before taking this by an Apple Store. This was intended as a Christmas gift for my wife. Can anyone spare me the embarassment?