I noticed a problem recently where Adobe Reader X freezes when I open a pdf file. It just won’t respond for about a minute or so and then work all right.
After digging around for everything that it is doing at launch, I found a quick solution to the problem.
- Go to Edit->Preferences->General
- Un-check “Enable Protected Mode at startup”
- Click OK to save the changes (acknowledge the warning)
- Shutdown Adobe Reader X and Launch again.
The issue should be gone.