Windows Vista Autoplay Stopped Working

I had a window that would pop up anytime I inserted a flash drive, CD, DVD, Etc. The pop up asked what I wanted to do.
For some reason it has stopped.
I think it was referred to as a autoplay window.
I checked control panel,hardware and sound, autoplay, and autoplay is checked.
I don't think I did anything to stop the pop up from working as just one day it was gone.
Any ideas on how to get it started again?

 

Been better that a week or two when the problem started. Hate to take a chance on loosing anything by doing a one or two week old retore

 

Pretty much over my head. Its not that big a deal and can live without it. I just worry every time Vista does something new to my computer. I hate not having control over what goes on with Vista.
Another thing I have noticed is that when I put in a DVD movie it does not start on its own. I have to start it. I do have DVD selected to run with Media player.
When I right click on the drive with the DVD installed I don't get the option to "Run With" but I do get an option to "play "

 

Ran sfc /scannow and passed with flying colors. No problems

 

First step in the link you sent me was to:
Ensure that Shell Hardware Detection service is running
States to run service.msc
Tried it in the run mode and my computer says it can not find service.msc
Tried it in the search mode and it can't be found.
Could this be for XP and not Vista

 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Locate the NoDriveTypeAutoRun registry entry on the right pane.
Mine reads 0x00000024 (36)
Not sure if that is good or bad.

 

In Vista the default is 0x91 (145)
I reset it to the above settings. All went well.
Do i need to reboot to take effect as right now it still doesn't pop up the autoplay screen when inserting a flash drive nor does a DVD start playing when inserted.