After days of following the fixes suggested by Adobe for
"Acrobat failed to connect to a DDE server"
I finally found another PDF download that worked for me after a 2 minute free download. I spent days "managing my add-ons", disabling security devices, turning off my firewall, installed, uninstalled & on & on & on. I found another PDF download that worked for me, maybe it will for all those having problems with Adobe Reader for Windows 7. Try www.sonicdownloads.net. Download (it's FREE) PDF Platinum. Let me know if it works for you too!