See supported System Configurations for information about supported platforms, operating systems, desktop managers, and browsers.
Running with less memory may cause disk swapping which has a severe effect on performance. Very large programs may require more RAM for adequate performance.
Troubleshooting the Installation
Windows Online Installation (IFTW) and Java Update FAQ
Proxy Settings and Authentication
Note: For any text on this page containing the following notation, you must substitute the appropriate update version number for the notation.
For example, if you are downloading the installer for update 1.6.0_01, the following file name:
1. If choosing "Windows Offline Installation", download and check the download file size
After clicking the JRE "Download" link for the "Windows Offline Installation" a dialog box pops up -- choose the following option:
This file contains everything needed to install the Java SE Runtime Environment, including the installer and character conversion classes and support for locales other than the US English locale.
2. Run the installer
You must have administrative permissions in order to install the Java SE Runtime Environment on Microsoft Windows 2000 and XP.
The download page provides the following two choices of installation. Continue based on your choice.a. Windows Online Installation - After clicking the "Download" link for the JRE, a dialog box pops up -- choose the following option:
This option starts the installation process by downloading and executing the file
jre-1_6_0_<version>-windows-i586-iftw.exe, which prompts you through the steps to download and install only the features you request. (The letters "
iftw" mean "install from the web".)
b. Windows Offline Installation - Run the file downloaded in step 1 by double-clicking on the installer's icon. Then follow the instructions the installer provides. When done with the installation, you can delete the downloaded file to recover disk space.
With either choice, the installer may ask you to reboot your computer3. If you want to run Netscape 7.x, Mozilla 1.x, or Firefox 1.x with Java Plugin, do this:
The installation process also installs Java Web Start.
Java Web Start
Note: You may see a misleading message if you do the following:
When you remove the application, you see an "Uninstaller Error" dialog saying "An error occurred while trying to remove Java-Application: <name> App. It may have already been uninstalled. Would you like to remove Java-Application: <name> App from the Add or Remove program list?" If you say yes to this, then you will see another "Uninstaller Error" dialog saying "You do not have sufficient access to remove Java-Application: <name> App from the Add or Remove Program list. Please contact your system administrator." This is the misleading message. It implies that the problem is due to privileges. It is not. The problem is that you have already removed the Java Web Start application when you removed JDK/JRE 5.x, but this is not reflected in the "Add or Remove Programs" dialog until it is refreshed by pressing F5 or it is closed and reopened.
To avoid seeing this misleading message, either press F5 or close and reopen the dialog. Any Java Web Start application that was downloaded and cached with JDK/JRE 5.x will no longer appear in the list of currently installed programs.
jnlp; MIME Type is
application/x-java-jnlp-file. It should be handled by the
Silent Install - To install the Java SE Runtime Environment non-interactively, which is useful for installing on multiple machines, use Silent Installation Instructions.
JRE Deployment for System Administrators - The JRE can be distributed to intranet users by hosting the .msi file on an internal website and asking users to launch the installer through msiexec. The other option is to install the JRE through Active Directory. The instructions for these are available in the "Intranet Deployment" section of JRE Intranet Deployment.
Launch Applications Directly - If you want to use the Invocation API to launch an application directly rather than using the Java application launcher, please see Location of VM Library Files (jvm.dll).