The guide has plenty of screenshots to guide you along the way, as well as a couple possible error messages and what to do when you experience them.

Once you’ve downloaded the right files, the guide then shows you how to use the Care Suite’s Product Support Tool to flash the file you just downloaded.

The guide starts off with how to find and download the appropriate stock ROM using Nokia Care Suite. So how do you use Nokia Care Suite to download and flash your Lumia device to its stock WP8 firmware? XDA Recognized Contributor anaheiim wrote a comprehensive guide detailing the exact process. Samsung devices have Odin and Heimdall, Sony devices have Flashtool, and Nokia devices have a few different options including Nokia Care Suite. Luckily, there are various device- or OEM-specific tools out there for to help people accomplish this task. Once you start mucking around with a device’s firmware to add all your favorite tweaks and whatnot, you’ll almost undoubtedly need to restore to stock at some point in the future.