Hard Reset SONY Tablet S

First method:

1. First press the Reset button (hole) + Power button.
   
2. Now your tablet will reset and reboots.

Second method:

1. Turn on your tablet.
   
2. Next goto Apps -> Settings -> Privacy -> Factory data reset -> Reset tablet.
3. Confirm all informations and wait until your tablet will reset and reboots.
4. Success!

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.