I have ADE on my old laptop and it works fine. I just tried to install on a new laptop running Win 7 and it will not work. I've wasted 2 hours reading through all related posts in forums and in Adobe articles. I've installed and uninstalled 4.5.7, 3.0 and 2.0. Most of the time, it just stopped working when I tried to move the book I borrowed through Overdrive to my Nook. In the older versions I started getting errors about not have permission to copy the book. So I de-authorized and reauthorized using my Overdrive credentials (I had authorized using no vendor ID before). Now I can't even get the books I'm borrowing to show up in ADE. I uninstalled 2.0 and went back to 4.5.7 and the whole thing is still stuck and will not download books from Overdrive. This program needs a Chat option.