Share your experience!
repair your phone with
Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Don't forget the Kudos
Try restart your phone first by pressing and holding standby button and volume up key until u get a vibration.
If not ok then try repairing your OS. Use Sony Update Service...
1. Make sure you have 50% or more battery.
2.switch off your phone and wait 30 sec. ( don't switch back your phone )
3. Press & Hold volume down key and connect your phone to computer.
4. Follow on screen instructions.
5. After update first booting will take some extra time.
Try using update service from Sony.
Hello. Thank you for your answers. I tried both solutions but they didn't work. :-(((( I'm starting to get worried.
I suggest that you download Xperia diagnostics and then do the touch screen test to see if your touch screen is faulty.
If the screen respond as it should the problem really should be solved by a repair in PC Companion or a factory reset. Make sure that you try to use the keyboard with no 3rd party apps installed and that you don't have any charger connected to the phone.