I'm trying to unlock the bootloader on my Advent Vega Tegra. All the drivers are installed, I can boot into the fastboot using adb and fastboot is detecting my device and showing me the number. When I type "oem unlock" I get the error (command write failed (Unknown error)) I've been working on this for a week and tried every driver I could get my hands on, Used The Tegra Supertools, nvflashed back to factory rom and still no change. The Vega helpteam are no use just told me to reflash and now nothing. Any ideas anybody? Superdrivers? Amazing Uber-Rom? Big Hammer?