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Try to perform a system repair
Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the onscreen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process
If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP
hello there
i got the same problem....i reinstalled the phine software...but here showing the same thing....nothing changed...now plz tell me what to do???plzz help
As above and if that doesn't work then you need to contact Xperia care http://www.sonymobile.com/global-en/support/contact-us/