I did 2 days ago an update, everything was smooth and phone was ok all settings remained unchanged. Today I plugged in the phone and PC Companio told that a new update is available. Since 2 days ago nothing bad happened I did it again. Now the phone was like after a master reset, nothing was kept. Luckyly I had backup but beware!
Mugur
http://mugur-ionescu.ro/tag/xperia
Mugur
http://mugur-ionescu.ro/tag/xperia