Talahassee said:
A good start would be to be sure your drivers (especially video
drivers like Direct X) are current.
(snip ridiculous drivel)
To the OP: Please make sure you have the most recent version of Java. Go to
this link and download the most recent version:
http://www.java.com/en/download/index.jsp
Then check in your Add/Remove Programs and uninstall all versions of Java.
Reboot. Now install the newest version.
To clear Sun Java's cache, Start>Settings>Control Panel>Java
applet>Cache>Clear or follow the same path to the Java applet and then to
General>Settings>Delete files.
If that doesn't help, we need more information from you to give you focused
troubleshooting such as how you connect to the Internet (method/ISP),
operating system version and Service Pack level, whether the computer has
been maintained and is virus/malware-free, and:
The First Question Of Troubleshooting: what changed between the time things
worked and the time they didn't?
Malke