I downloaded the newest reader, uninstalled all previous versions, cleaned out temp files etc., etc. No problems with the download process. I clicked on the icon and... nothing happens, not even an error message. I tried starting it from the program list in the start menu and by trying to open a .pdf file... same thing. Uninstalled and re-installed...twice...with same results. Previously, I had been using version 5.something and that worked fine. Any thoughts or suggestions of what to try would be greatly appreciated... or barring that, if you could point me to someplace where I could just re-download version 5. Thanks in advance. BTW, I'm running XP and exceeding all of reader's listed system requirements.