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
Try Windows Phone 7 (Mango 7.5) On Your iPhone –
You seen images Windows Phone 7 (Mango 7.5) and thought you might like to try it but only have a android device or iPhone at hand ? Well Microsoft have tried to win you over to the dark side by allowing both Android and IOS users to experience the Mango 7.5 user experience on their current devices. This does not require any jailbreak , downloading or even registration. To get access to this HTML 5 copy off simply visit http://aka.ms/wpdemo in your mobile browser , to get rid of the bottom bar on a IOS device you can simply add it to your home screen. You will be guided around the OS by blue dots and some obvious features such as voice recognition and camera are not available.