All right Wyatt, I don't have an ATI card, but I was able to do some research and come up with a possible culprit. According to information from this thread, the overdrive option could be tied to the ATI Hotkey Poller service. It mystifies me why this would be, but when I looked up more about the service I got this article which says specifically:
This is my best guess at this since I have nothing to work off of except the sources I can get from the internet. Check if you have this service running, and if you don't try enabling it to see if it fixes the overdrive problem.ATI Hotkey Poller (ati2evxx.exe) - Also called the ATI External Event Utility, this service is primarily needed if you use the ATI Hotkey settings available in the ATI Catalyst Control Center. However, before disabling this service note the following: If you use a third party overclocking utility, you must disable this service otherwise the utility may not work; if you have an XT, X1X00 or newer graphics card, disabling this service can also disable the OverDrive section in the Control Center
In order to modify the services running on your computer, go to your control panel, click administrative tools, and then click services. A window should pop up with a bunch of services on the right. See if the ATI Hotkey Poller is running, and if it is not, enable it and restart your computer. You might need to restart your computer before the change has any effect. See this thread for screenshots and more thorough instructions.
btw, I found this while I was researching the problem and I had to lol ^^; Be patient, I have a life too you know :P.