Checking for Java 6 on Windows
- Select "run..." from the Windows start menu

- and type "cmd."

- Hit enter. You will see a command prompt like this

- Type "java -version" and hit enter.
- If you see text like this, indicating a version of 1.6, you're
fine. :-)

Nothing more to do. Carry on installing what you were going to install.
- If you see a version lower than 1.6, such as 1.5 or 1.4, then you need to install the latest version of Java, available freely from Sun.