Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Lines Begin To Appear Outside Apple Stores Ready For The New iPad –
Can you remember late last year when we interviewed Rob Shoesmith who was camping out side the Apple stores ready for the iPhone 4s launch , Well it looks like he has some other like him at this current time there is currently two guys sat out side the Apple’s Regent Street store. The new iPad does not launch until Friday in which they are expected to sell out with in minutes.
All I can say is Good Luck & Have Fun!