How do I disable accessibility features???

I'm using Acrobat Standard 8.1.2. I made a change to the program and I can't undo it. It started when I installed voice recognition for Microsoft Word. Then, the next time I started Acrobat, it brought up the Accessibility Setup Assistant. I didn't really know what was going on. Now, whenever I pull up a new document, I get a window that says "Content Preparation Progress". In the window, it says "Please wait while the document is being prepared for" (it doesn't say for WHAT). Then if I open up a PDF of something I scanned, I get a window called "Scanned Page Alert". The message is "This page contains only an image of a scanned page. There are no text characters. Would you like to run character analysis to try to make the text on this page accessible?" There's a box I can check that says "Do not show again", and I can click that I guess. The problem is, Adobe seems to want to make every document I open accessible, and I just don't need that. I've noticed that on PDF's made with text, the text now appears very bland (probably because it's been made "accessible". And I can't figure out how to undo what I did. Please help!!!