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
DJ Uses Macbook Pro At Microsoft Store Opening
Microsoft recently opened their store on the East coast at the Tysons Corner mall in McLean, Virginia.
The stores location like other Microsoft stores is placed as near as possible to an Apple store.
The event looks like a big mess up to me , they hired a DJ to entertain the public and to launch the store with a bang but it looks like he didn’t trust and use Windows himself after he turned up using a Macbook Pro which Microsoft made him cover up with a windows logo.
There was a massive line for the stores opening but this was not because they were all geeks and wanted to get there hands on the latest laptop or phone but because Microsoft were giving away free Joe Jonas concert tickets , to get a free ticket you had to line up the day before.