Flashing Nexus 6 Firmware

Latest ADB/USB Drivers for Nexus 6: https://dl-ssl.google.com//android/repository/latest_usb_driver_windows.zip

Factory Images for Nexus 6 :  https://developers.google.com/android/nexus/images#instructions

 

fastboot flash bootloader C:/image-shamu-XXXXXX/bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:/image-shamu-XXXXXX/radio.img
fastboot reboot-bootloader
fastboot flash system C:/image-shamu-XXXXXX/system.img
fastboot flash userdata C:/image-shamu-XXXXXX/userdata.img 
(Note: this command will wipe your device (including /sdcard), EVEN if your bootloader is already unlocked.)

fastboot flash boot C:/image-shamu-XXXXXX/boot.img
fastboot flash recovery C:/image-shamu-XXXXXX/recovery.img
fastboot erase cache
fastboot flash cache C:/image-shamu-XXXXXX/cache.img

Fastboot flash:
Bootloader.img
Radio.img
System.img
Boot.img

Then Reflash TWPRP and SuperSU