This doesn't really answer your question, but stop using Adobe Reader. Have you ever seen how much memory/CPU it uses? I use FoxIt Reader. It's faster and not such a resource hog.

>Since recently, all PDF documents I open are at 135%. This is always a waste of time as I need to zoom that to 100%. Is there a switch for that?
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>Also, I have found my scrollbar is no longer visible. So, I cannot use the mouse to scroll the document but only with Page Down. Is there something in regards to that?