How can I fix my tablets problem, an error popped up and I don't know what to do?

[AC Question]

How to fix my tablets problem..plz read the details and plz fast give me answer..

I have qtab v10 android 4.4.2 kitkat... After a long time i decided to go to about tablet and wirelees update for my tab.. It started updating but then came an error... I prees power off button and it gave some commands of reboot, clear,backup,restore... I tried all except factory reset... Plz tell fast