Here's how to do it:
1. Go to C:\Program Files\Adobe\Acrobat 6.0\Reader (replace the C if you installed on another drive, like I did).
2. Create a new folder called plug_ins_disabled.
3. Move all files from the plug_ins folder to the plug_ins_disabled folder except EWH32.api, printme.api, and search.api. There should only be these 3 files in the plug_ins folder.
4. You're done.
(Courtesy of Darrell Norton)