Googlehas now startedrolling out November security updatesto its devices, patching some critical security vulnerabilities. You will receive over-the-air notifications to update your Pixel and Nexus devices - which are now collectively called as "Google devices". If you don't want to wait, you can manually update your Nexus 6P, Nexus 5X and other devices to the latestAndroid 7.0.0 and Android 7.1.0 Nougat security patch.

Prerequisites to update Nexus 5X, Nexus 6P and other devices to NRD91N, NBD91K Android 7.0 Nougat

Create a backupof all important data on your Nexus device.Download and installUSB driversfor Nexus on your computer.UnlockNexusbootloader.The Android SDK should be installed on your PCwith ADB and Fastboot command working.Enable USB debugging option by pressingMenu>Settings>Applications. Navigate and tap onDeveloper Optionsto enableUSB Debugging.Ensure that your Nexus phonecarries more than 70% of charge.

Steps toupdate Nexus 5X, Nexus 6P to NRD91N, NBD91K Android 7

Required files:Download factory images for your Google devicefrom here. Remember to download the factory images, NOT the OTA files.

Connect your device using a USB cable and turn it off. Make sure that Fastboot is installed on your PC.Now, start the device inFastbootmode:Turn onthe phone while pressing and holding theVolume Up+Volume Down+Powerkeysuntil you see the Fastboot menu and the START text on top.Extract the downloaded Android 7.0 file on your PC. Go to_NRD91N_(depends on your device)folderand copy/paste all the files to your Fastboot directory (which often is the platform-tools folder inside the Android SDK directory).This step involves flashing the desired factory image to yourNexus device. Open the folder containing the Android Nougatfactory image downloaded and extracted. In the address bar, typecmdand type the command written below and press enter.OnWindows:Runflash-all.batOnMac:Runflash-all.shusingTerminalLinux:Runflash-all.shOnce the script finishes running, your Nexus devicewill reboot. First boot may take up to 5 minutes, so don't worry if it takes your device longer than usual to boot up.