I'm using windows 7 and trying to open active directory on my pc. When it opens I get a error with MMC could not create the snap in. I have tried to run it as a admin, same error. I tried to right click and run as different user but that option does not appear? I have held down shift and right clicked to try and get the run as different user and it still does not appear. I'm new to active directory and have only used it a few times before. This is the first time I've had this error and can't use the program.