Ever had a botched system update on your Lumia device, or wanted to downgrade for a reason or another? If so, then you've probably heard that you need to flash back the Windows ROM.

While there are various device-specific or OEM-specific tools to do so for you, it can still be a daunting task for a new user trying to understand what all those terms and programs are for.

Fortunately, XDA Recognized Contributor Kaptaiin has put together a well-detailed tutorial that covers everything about flashing Windows Phone 8.x or Windows 10 Mobile on your Lumia device. It'll start off by explaining what you'll be doing by defining ROMs and flashing, then continue to walk you through all the prerequisites. Every single step is covered, from finding the ROM to installing it (using Windows Phone Image Designer), with annotated screenshots to help you all along the way. And if you still happen to encounter some problem that isn't covered in the FAQ section, you can always ask the community in the thread!

If you're in a situation where you need to restore your Lumia phone back to stock, or maybe downgrade back to an earlier Windows version, then head over to the tutorial thread to learn more and get started.