title: Safety update JDK 6.0 to JDK 7.0 on Windows 7
body: <p>I have already JDK 1.6.0.0_25 on my computer with Windows 7 Professional. </p>
  
  <p><img src="https://i.stack.imgur.com/KUgYW.png" alt="enter image description here"></p>
  
  <p>How I can savety update current JDK to JDK 7.0 and tesing this update?</p>