Note: This Java deployment guide describes features released prior to the Java SE 6 update 10 release. See Java Rich Internet Applications Development and Deployment for the latest information.
Q: I downloaded the installer and it is only 200KB. Why is it so small?
Q: Why does Java Update ask me to reboot?
Q: Netscape/Mozilla is not working correctly with Java Plug-in. Why?
Q: How can I uninstall the Java Update version I just installed?
Q: Error 1311: Source File Not Found. Could not
find C:\Downloads\ja555000.cab.
Q. I have "Check for Updates Automatically" checked in the Java Control Panel, but scheduled automatic updates do not seem to happening. Is there something wrong?
A: The automatic update feature works only on Windows 2000 with SP3 and WindowsXP. If you are running on one of the other supported operating system, this feature will not work. If you want to do an update, use the Update Now button for manually updating Java.
Q: I downloaded the installer and it is only 200KB. Why is it so small?
A: The Java installer is designed for Install On Demand. It will download more installer files based on user selection and system configuration. Using this installer helps users avoid downloading large amounts of unnecessary files.
Q: Why does Java Update ask me to reboot?
A: Rebooting is sometimes required because installing Windows Installer 2.0 the Microsoft technology used by the Java installer requires rebooting.
Note: Java Installer now detects Java enabled Mozilla browsers locked files and will prompt you to close the browser so that a reboot can be avoided.
Q: I had the Java Control Panel open for Java Update and the About tab showed version x.x.x. Then I ran Java Update and it still showed version x.x.x. Why is this?
A: You need to close and restart the Java Control Panel to get the updated Control Panel.
Q: Netscape/Mozilla is not working correctly with Java Plug-in. Why?
A: First close all the browsers sessions. If this does not work, reboot the system and try again.
Q: I try to
install on the D:\ drive and Java Update is still
installing files onto the C:\ drive. Why?
A: Regardless of whether an alternate target directory was selected, Java Update needs to install some update files on the Windows system drive . Doing so saves download time on future updates to the latest version of Java.
Q: How can I uninstall the Java Update version I just installed?
There are two ways to accomplish this:
Q. After the JRE bootstrap installer is downloaded and executed, why does the message "This installer cannot proceed with the current Internet Connection settings of your system. In your Windows Control Panel, please check Internet Options -> Connections to make sure the settings and proxy information are correct." appear?.
A: The JRE bootstrap installer uses the system Internet Connection settings to connect to the web for downloading extra files. If you are behind a firewall and require proxy settings, make sure the proxy settings in Internet Options/Internet Properties are set up properly (Start->Control Panel->Internet Options/Internet Properties->Connections->LAN Settings ...).
If you can browser the external web (i.e., outside the firewall) with Internet Explorer, then your proxy settings are properly set up. The installer doesn't understand the proxy settings specified in Netscape/Mozilla.
Q: I found two
processes—jucheck.exe and
jusched.exe—running in the background of my
system after installing JRE. Is there a way to shut them
down?
A: jusched.exe is the scheduler process of Java
Update; jucheck.exe is the process for
checking/performing updates in Java Update. These processes run
automatically and transparently to users. To shutdown these
processes, simply uncheck the "Check for Updates
Automatically" checkbox in the Update tab of Java Control
Panel.
Q . After Java Update updates my
system, my browser still uses the Microsoft VM, or an older version
of the Sun Java VM, to run applets. What's wrong?
A: If you installed the JRE through the Custom option but unchecked the browser selections, you may run into this situation. To fix the problem, go to the Browser tab in Java Control Panel and check the browsers that you want to run the newly installed version of Java.
Q: When I click the "Update Now" button from the Java Control Panel, it complains about the system being "offline." What does that means?
A: Java Update can only be run if the system is connected to the network. A system that is not connected to the network is referred to as being "offline". When the Update Now button is clicked, it will check the online/offline status of your system. If your system is not currently connected to the network or dial-up networking is disconnected, the error message will show up. Check that your system is currently connected to the network and try it again.
Q: I followed the instruction to install version x.x.x. After the installation and reboot, a message popped-up from system tray saying an update is available for download. What should I do?
A: The message is part of the Java Auto Update mechanism, which detects at user login time if a newer version of the JRE is available for download . You may simply click on the system tray Java Update icon to download and install the update.
Q: I want to run Java Update but I am afraid it may cause problems on my computer. What should I do?
A: You may want to backup your Windows registry before testing out Java Update. The following command will export the necessary registry keys to a file:
regedit -e reg.1 -t HKEY_LOCAL_MACHINE
regedit -e reg.2 -t HKEY_CURRENT_USER
regedit -e reg.3 -t HKEY_CLASSES_ROOT
To fully restore the registry keys, the following command can be used to import the exported registry values:
regedit -i reg.1
regedit -i reg.2
regedit -i reg.3
Q: I encountered the error "Error 1606: Could not access network location file MSI/CAB and still fail after immediate retry." when running the Java SE installer.What does it mean?
A: This problem occurs when the server is too busy or when the network is too congested to serve the file. Please retry by running the installer again.
Q: I encountered the error "This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package." when running the Java SE installer.
A: There are several possible reasons:
To address these problems, please make sure third-party
downloader/TSR programs are turned off and the network connection
is setup properly. Also, if a proxy is in use, make sure that proxy
authentication is turned off.
Q: Error 1311: Source File Not Found.
Could not find C:\Downloads\ja555000.cab.
A: This is a known MSI engine problem. See following:
http://support.microsoft.com/default.aspx?scid=kb;[LN];Q290106http://support.microsoft.com/default.aspx?scid=kb;[LN];Q307346http://support.microsoft.com/default.aspx?scid=kb;[LN];290896Q: Error 1722. There is a problem
with this windows installer package. A program run as part of the
setup did not finish as expected. Contact your support personnel or
package vender.
A: If you encounter this error please contact the feedback alias at
java-deployment-feedback@sun.com.
