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Adobe Reader XI SLOW in Windows 7 64-bit
Just installed Reader XI (11) on a perfectly fine laptop running 7 x64. Holy cow, Reader XI is WAY slow doing ANYTHING--not just opening the program or PDF's, but even clicking in its menus. I found this thread re: Reader X/10 and followed Spengler's advice--disabled "Protected Mode." That's the ticket. After making that change, Reader is behaving properly, no long lags for every action.
In Reader XI, go to Edit/Preferences/Security (Enhanced), and uncheck "Enable Protected Mode at startup." (I also unchecked "Enable Enhanced Security" but that may not be necessary.)