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Boot on safe mode and report back
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
If safemode doesn't work then repair your phone with PCC
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
or you could reset the phone with MyXperia or Android device manager
I found the guilty apps ! TopMercato an app for soccer news. I uninstall one by one the third part apps which have widget. Thank you again for helping me. Best regards.
Anytime