Where are stored the images of devices created with Android Virtual Device Manager (AVD Manager) ?

 The images of devices created with AVD Manager are stored in the following folder on a Windows 10 computer :

C:\Users\[Your Username]\.android\avd\

This can be useful because sometimes you need to delete an image created with AVD Manager and deleting it from AVD Manager can fail, so by browsing to the good folder you can then remove the folder manually.