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i received notifications on my z3 compact of the update version 23.2.a.1.62, so i went to my pc to use pc companion, it also found the update,but when it started to update and automatically turned off the phone, there was a message "Sony Update Engine doesn't have software available for your phone", what should i do?
Does your phone switch on still? however all you can do is keep checking but it may have been a glitch or a false alert, Contact Xperia care to have this confirmed - http://www.sonymobile.com/global-en/support/contact-us/
You should also take a look here:
/t5/Software-Updates/Xperia-Z2-Lollipop-Update-PC-Companion-Error-11-and-other/td-p/964488/page/19
PC companion is not working any longer so use Xperia companion.
Make sure that you closed the antivirus and the firewall