Share your experience!
After updating my software, my menu button, camera, messaging,apps and contact buttons are not working on my main screen.
The best you can do is reinstall the update again.
WHen you install an update, is better that you do it twice, as many problems will be fixed doing this... if doesn't, then contact Sony.
Good Luck!
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
for future reference
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
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