password problem

[xperiaa]

Two days ago I updated my Xperia Z, to 4.2.2  When the update was finished I turned the power off. The next morning I turned on my phone. First it asked two passwords, as usual. But now, after the update, my phone asked me a third password, which I have never set. I can't use my phone right now, because I don't have the password. Does anyone have the same problem or can anyone help me? Thanks

[Henke]

Have you tried to do a repair of the phone software?

Click on this link to get Sony PC companion:

http://www.sonymobile.com/gb/tools/pc-companion/

Start PC companion, start "Support Zone", start "Update phone software" and click on "Repair".

Follow the on-screen instructions.