verifying Adobe Acrobat--

I am not sure how often this happens--maybe once a month? but when I open my Acrobat Pro on my iMac I get a pop up progress bar window "Verifying Adobe Acrobat"  This takes at least 10 minutes to process before I can use the program. Extremely annoying--Why is this happening?  I like Acrobat but am not a power user and not using it for commercial use.   Is this some sort of security thing that assures that I am the lega; user?  I can't stress how annoying this is.  Am I overlooking something withing the preferences to bypass this  Similar frustration with the updating of the program.  With no warning the progress bar pops up at night when I am about to shut down the computer.   The message says, if you shut down while update in process, it could damage the computer.  I have tried to check for updates manually but lead to a page that cannot be found.  Acrobat is a good program but Adobe needs to come out with a version that is targeted for non-commercial users and not so finiky or pricy--looking for a substitute.  Thanks