Fastboot Error Failed To Boot Into Userspace Fastboot One Or More Components Might Be Unbootable

If locked, unlock it (note: this wipes data):

Search for "EDL flash [your phone model]" for specific instructions. This resurrects devices that no longer even respond to fastboot devices . If locked, unlock it (note: this wipes data):

fastboot reboot bootloader

Post the output of fastboot getvar all and the exact command you ran before the error on forums like XDA Developers, Reddit’s r/androidroot, or the Telegram support group for your specific device. " open Device Manager

If your phone reboots to a screen that says but your PC says "waiting for device," open Device Manager , find the "Android" device with a yellow warning, and manually update the driver to "Android ADB Interface" . Switch Active Slots If locked, unlock it (note: this wipes data):