Zip File ~repack~: Android 7.1.2- Download

Google hosts official factory images for Android 7.1.2 (e.g., for Nexus 5X, 6P, Pixel C). These are ZIP files you can flash.

Reliable download sites provide a "checksum." Use a tool to verify the zip file isn't corrupted before installing it. How to Install Android 7.1.2- Download Zip File