I ask this because I have 1100 Windows 7 laptops deployed and Adobe Reader X doesn't work when viewing PDF documents through a web browser. I've read the discussions here that suggest uninstalling Reader X, or using the repair tools to fix the issue, but I can't put my hands on each computer. I would ultimately like to push an uninstall of Reader X and then an install of Reader 9.4 though AD. Any thoughts or suggestions??
From what I could see, you have used a GPO methodology for deploying Adobe Reader X across the user systems in the first place.
You could simply unlink the GPO package associated to the respective OU. This would uninstall Reader X from the systems falling in the OU and enable you to reinstall Adobe Reader easily.
Hope this is what you wanted.