Android OS draining battery

[mwai]

android os is topping the list of apps draining my xperia U battery. its just so sudden and my battery is drained to 0% within an hour because of this. help.

[_alexdon_]

Software issue,try a software repair with sony update service.

[mwai]

can you guide me by explaining step by step how I can do that? please

[_alexdon_]

http://www.sonymobile.com/gb/tools/update-service/

Download,install,open and follow the steps.It is easy.