Share your experience!
Check if the same occurs in safe mode:
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008
once you connect to latop c companion, backup data and perform a repair by clicking on the device symbol top left of pc companion where it states yor current firmware version.pls be aware repairing device will wipe all data on device so pls perform a data backup either on your micro sd card on device or via pc companion backup and restore application
Have you restored all your stuff after the repair?
Have you tried not to restore anything and see?