Short cut to Minecraft Opens, but The Launcher opens for a brief second but then shuts off.

Minecraft Shortcut and Launcher problems

I thought when ever I clicked the shortcut it should open the launcher
Right?

What happened was It opened for a brief second, but then closed.

Steps to Reproduce:
1. For me i just simply click the shortcut which it tries to open the Launcher
2. Downloading Mods has made this happen before

Also i have checked all of my .minecraft,and minecraft.exe files for any weird problems, but everything is in order. So i have no idea what is going on.