Found a sneaker fastboot that was hidden in an android folder and ran the adb and fastboot as administrator then reinstalled the drivers. It worked. I'm unlocked now.Mine did too. Have you tried replacing the fastboot.exe in platform tools? The one posted in @roirraW "edor" ehT guide. I had the same issue until I deleted the fastboot.exe from the platform tools folder and replaced it with the one from sdk download.zip. Once I did that the the fastboot command worked