I found this information at the following discussion http://www.tek-tips.com/gviewthread.cfm/pid/269/qid/836855.

1. Search for your java.exe and get its full path directory (eg. C:\Program Files\Java\j2re1.4.2\bin).

2. Then, go to Control Panel->System->Advanced->Environment Variables.  Then, under your system variables, make sure that you can find your java's full path directory under PATH there (eg. C:\Program Files\Java\j2re1.4.2\bin; - Note the syntax here and you do not add the file name).  If not, add it or correct it. Make sure that you do not remove anything in your system variables

3. Save it and restart your system.

If it doesn't work, try reinstalling your JVM.  Go to http://java.sun.com and find JRE.
 
If it still doesn't work, then you might want to disable it.
1. Go to Start->Run, and type in msconfig.  A window should popup allowing you to choose what applications you want to start at startup.  Disable your JVM or anything that related to that. Don't disable everything. :P

I hope this information is helpful to you.  Have a great 4th of July!