My Minecraft Launcher Only Has a Loading Button

I have played Minecraft for a long time and this has never happened to me before. I recently just built my computer and I am running Windows 7 Home Basic. When I run Minecraft this is the screen I see:

Can anyone help me with this problem? I am an avid Minecraft player and would like to see this problem solved as soon as possible.

There are two possible solutions. Try both and you should be good to go.

• Download the launcher again from minecraft.net.

Try to run Minecraft and if it still doesn't work do this:

• Press the Windows Key + R and type %appdata% in the small box.
• Locate the .minecraft folder and delete the versions folder inside of it.
• In some cases you might have to delete the whole .minecraft folder. In this case make a backup of it to save your resource packs and world saves before deleting it.

Now the game should work as intended.