Yes i accepted now that the money is gone. I factory reseted my computer now and changed all my passwords. I wont use the wallet at blockchain info anymore. I already got elsewhere an other one and everything just worked fine after the factory reset. Thanks to all of you for your help.
I responded to your PM. It is possible you were infected by a virus.
If you're using Windows, can you press run, type cmd and then run the netstat command. This may expose your IP and other personal information so if you want you can PM this.