According to Microsoft, the Photos Media Engine Add-on is a tool that adds the Photos app with advanced search capabilities that let the users find photos by places, people, and things. In simple words, it enhances or improves the search capabilities of the Photos app. Photos Media Engine Add-on was released in 2019 for Windows 10 users. It was since installed by default on the Photos app on Windows 11/10. If by any chance or failure in an update, if your PC misses the Photos Media Engine Add-on, you can install it easily. Let's see how you can do it.