App Store, Messages and FaceTime Won't Open

Question

I own a Macbook Pro (15-inch mid 2010), OS X Mountain Lion (10.9.5)
I was using my Messages App just this morning and all of a sudden it stopped working.
I have tried opening it from the Applications Folder as well as directly from my Dock.
What happens is the icon for the Messages App bounces several times (usually three after I press it the first time) and the screen will not appear.
The icon shows currently that I have three unread messages and even when I hold and click and try to open a "new message" or an "unread message" the screen won't open.
I tried several other apps just to see if this was an isolated incident, but I found that FaceTime, App Store and iPreview will not open either. They all bounce a few times, but they will not open a screen. My App Store even shows that there is one new update, but it won't open.
I have tried so many things from a lot of older threads but I am completely clueless on what to do.
Can anyone help me?

Answer 1

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen. Click the Clear Display icon in the toolbar. Then take one of the actions that you're having trouble with. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
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