In order to hard reset a Sony Ericsson Aino, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sony Ericsson Aino device will be brought back to the default configuration of a brand new device.
1. Download the PC Companion and install it on your PC.
2. This window will appear. From it, select Support Zone New! and Start.
3. New window should pop up. There, select Phone / Tablet Software Update and Start.
4. Then select repair my phone / tablet.
5. Follow the on-screen instructions. Wait for the software update to complete.
6. Select your phone's model. When informed to, connect it to the PC.
7. Done.