Install Sony Xperia Drivers, Download normal and S1Boot Drivers
there is two different USD drivers, one for normal use and second for download mode operations.
1-Normal Drivers
You need to ensure that your PC has all of the necessary drivers installed for your Sony Xperia device.
The best way to do this is to install Sony PC Companion.
2-S1Boot Drivers
Download S1Boot Drivers in order to flash or hard reset Sony Xperia device
3-Download Area
| Software | Download |
| Sony PC Companion | Download link |
| S1Boot Drivers | Download link |
Tutorial link
How to install S1Boot Video tutorial