VAIO "Assist" button not work, can't recovery my Factory Setting

[moaminsco]

Hello!,

I have SVE1512K1RW, (Windows 8.1 Pro) i wanted to install Mac OS on my laptop, for creating partition, i used "AOMEI Partition Assistant Professional Edition 5" after create i regret. Then i deleted this partition, after delete "Assist" button not worked, i see my "Recovery Partition Area" has, but when i press "Assist" button (during laptop off) it will start Windows, please help me, what must i do???