Default [Q] Can i unlock my bootloader with this?

Hello everyone this is my first post on the xda community
I tried to unlock the bootloader of my phone, Sony Xperia Arc s 12w14 reading several posts without good result ... The member of the community Alejandrisssimo also tried and failed ...
can i unlock my bootloader with this or is it just to install drivers in windows?

Thanx a lot and sorry for my english