Heads up: Apple has officially acknowledged a 1TB Seagate hard drive failure issue affecting iMacs sold between May and June 2011. Hard drive replacement is free, so just click the source link for all the info. [Apple]
I'm surprised nobody's commenting on the title.
Anyway, I like how Apple say "Finding your iMac serial number is easy." and give you instructions to turn your desktop upside down.
Reminds me of the time when I had to find my serial number. I cbf to unplug it and place it on my bed, so I took a picture of it. Actually had to take like 3 because I could barely hold the iMac and camera at the right angle.
I then kept on reading the damn page and it told me how I can just check the "About This Mac" window. They seem to have swapped it round now -_-