Share your experience!
I am requested every day to update my phone even if I have just updated it!
Did you buy the phone recently? If yes, there might be a number of pending updates released and you'll have to install them one by one.
Alternatively, you can perform a software repair using Xperia Companion. This will do a clean installation of the latest firmware and will also wipe your internal memory. Don't forget to backup using Xperia Companion, but preferably without adding apps or settings to the backup.
No it's not new but it's been happening since new.