Windows 7, professional 32 bit.

When I used to insert a CD or DVD in one of my drives, it would recognize that I had inserted a DVD and come up with a Drop Down Menu on my Desk top that gave me a choice of Saving, Running etc. It no longer does this and I have to go to MY Computer, find the DVD Drive, click on it and then click on the file I want to run. If I remember correctly, there is a choice somewhere in Windows, that gives you he choice of doing this or not to recognize the drive. I can't find how to do that. Any Help? Thank You in advance.