After downloading Adobe Acrobat, I am unable to open a .pdf. I receive an error message that there is a task that is still active in Acrobat that needs to be closed. When I go up to the file menu on Adobe Reader all option are grayed-out or unavailable, except hide file. What gives? I can't even shut down my computer because it says adobe reader is still active. Please, help. At this point I just want to turn my computer off.
Go into the Activity Monitor and Quit or Force Quit the Acrobat process.