Can not update Virus definitions

My virus definitions will not update.  I get the message another process is running.  I tried to modify but get the same message.  I also can not uninstall.

Hello, Joel.
Could you provide a screenshot (http://avgclick.me/getscreenshot) of the error message? Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. Did you mean you tried to repair AVG program when you say 'Modify'?