I had the same problem which you had too. And I found it, so it wasn't something wrong with computer or with Maya. It is a little mistake which Maya is doing while we try to render something. So to fix this little issue you need to open "Render view" and where is "Render" take away the click from the checkbox of "Render selected objects only". For me it worked great, hope that for you too. Thank you! Thank you, olegcotuna. I to had the same problem as the previous post and knew that my version of Maya was running fine. I was loosing hope until you commented on the "Selected Object" check box, and immediately, slapped myself for forgetting to deselect it when I was trying to save time by running test renders of specific objects in a very complex scene. You saved me! Oh, by the way, did I say THANK YOU.