Mathias Ricken - 2010-04-05

What version of DrJava are you downloading? Are you using the EXE file or the JAR file?
We've found that using the JAR file may sometimes avoid problems.

If that doesn't help, I suggest uninstalling all your JDK and JRE versions and installing the latest version of the JRE and JDK (JRE/JDK 6 Update 19) on a clean system. Sorry, there just isn't very much information available about your problem.