Acrobat reader takes 5/10 seconds to load when you want to open a pdf document. There is a way to speed up the loading.
1. Go to the installation folder of acrobat reader(C:\program files\adobe\acrobat\reader\.. whatever)
2. Cut all the files and folders from the "plugins"(or plug_ins) directory to the "Optional"directory.
Also make sure that acrobat reader is not open else it will lock the files and not allow you to move the files).
Now your acrobat reader will load very fast and almost as good as notepad.