This problem happened in Outlook 2010. I uninstall/install the software to no avail. I then upgraded to Outlook 2013 (fresh install) to no avail. I noticed that when I am in the send/receive tab, many buttons (Send/Receive All Folders, buttons under Send/Receive Groups do nothing when clicked and are grayed out, etc.) do not work. I do have a POP account created (Gmail POP), and the product is activated. What's odd is I install on my laptop as a test, and all is well. It works fine on the laptop. I even created fresh new .pst file but to no avail. What the heck? Also, how do I install updates for it? At the moment, Im currently running MS Office Pro Plus 2013. It must be something tied into my PC. If I need to uninstall again, is there a way I can remove the traces from the registry? If so, how?