Download the free Undistractr app here

After installation, open the app.txt file in your C:\Users\<username>\AppData\Roaming\Undistractr\ folder, and add or remove the applications

that you would like to close. Enter each application on a new line.

Run Undistractr from your start menu, hit the button and all distracting apps are immediately closed.

Undistractr kills any distracting apps instantly, so you can focus on your work.

Undistractr requires the .NET 4 runtime. Download here