MEmu 7.0.7 Version is the best Android emulator; it is mostly used in low-end computers because the other versions of Memu run on your high-end PC.
Its Android version is quite old, so you should download it. And you can run it on an old PC too; you get the key mapping to view the latest ones, and you also get Play Store inside it. If you have an old computer, forget that you will have to use the same version to run the MEmu version