If you are unable to select or highlight specific text in a PDF document in Adobe Acrobat Reader on Windows, this post will help you fix it.

Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.

Open Adobe Reader or Adobe Acrobat, and view PDF files as you normally would. Click "File" on the menu bar. You should no longer see a list of recent files viewed in the application.