If you already have the latest java on your computer, you will notice that by default it constantly wants to update. I find this quite annoying as it always seems to pop-up at the most unopportune time.
Here is how to disable the updates.
1. Open Control Panel and double click JAVA Plugin.
2. Choose the update tab.
3. Uncheck the box for "Check for updates automatically".
Then you can choose when to update by going to this tab and choosing manual update.
And there you have it.
If you do need java, please visit http://www.java.com/