When I turned on my computer this morning a heard a fan go on for the first time.  Is this something I should be concerned about,  I am sure I have never heard it before.

When I turned on my computer this morning, a fan like noise and air came out of the back of the computer.  I have never heard this before.  Should I be concerned, and why am I hearing this for the first time?

I don't believe it is cause for concern, but I would perform a System Management Controller reset:
http://support.apple.com/kb/HT3964
From the above:
Additional Information
The System Management Controller (SMC) is responsible for many low-level functions on Intel-based Macs. These functions include:
Responding to presses of the power button
Responding to display lid opening and closing on portable Macs
Battery management
Thermal management

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    Try:
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    When I set up email for the first time, I had to enter a 4 digit pin. Since then, every time I switch my phone on, I have to enter this pin.   How do I remove or bypass the pin so that I can switch on the Iphone without having to first enter a pin?

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  • Hard drive on my mac died, installed new hard drive.  When I try to sync my phone for the first time, will the computer wipe all the songs, photos, ibooks from my phone?

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