problem in xperia -u for taking back up

[shanu]

i have  problem that i can't take backup of my xperia -u in my laptop
many times i download sony pc companion and also i try these process in other laptop including sony vaio

so i suffer from this because  i want to downward my xperia -u in 2.3
from 4.4
because after update its work very slow.
so for this i need backup of my mobile
please help me
i attached a snap shot of message that accrue in  my laptop screen so please see it and give me solution for this problem.

[Fahim715]

Try download any backup app from playstore, make sure that the app support gingerbread version of android