To update Java on a computer that uses a Windows operating system, version 2000 or newer, click on the notification message above the taskbar, and wait for the process to finish automatically. If that fails, initiate the update manually by clicking the Update Now button in the Java Control Panel.
As long as the auto-update option is enabled, the computer automatically checks for new Java updates every time it boots up. If a new update is available, Java notifies the user and asks for his permission through the User Control Access prompt on computers that run on Windows Vista or newer versions. To specify an update schedule, click on the Advanced button in the Update tab of the Java Control Panel, and select a desired customization option for the daily, weekly and monthly schedules. To disable automatic updates, uncheck the box next to the Check for Updates Automatically option.
Users can specify whether they want to be notified prior to downloading the update or prior to installing it. The former option is set by default, and it prevents Java from downloading the necessary files without the user’s permission. The latter option allows Java to download the files automatically without permission, although it still requires permission to initiate the update installation process.