I'm trying to install Android 4.4.2 and im stuck at unlocking bootloader, more precisely with installing s1boot fastboot drivers. I start phone in fastboot mode by pressing volume up and plugging usb cable to my pc, blue light shows up and windows says that drivers are not installed, great. However, when I try to install the drivers it never succeeds. I manually point the way to the usb_driver folder. So I'm asking if there's any other way than this to install the drivers or how do i do it this way.