On a machine that's running Vista, when I try to edit a file using
Internet Explorer, I get the following error:

java.io.IOException: Cannot run program "cmd": CreateProcess error=5,
Access is denied

I'm sure this is a problem with the combination of Vista and Internet
Explorer, as it doesn't happen with Firefox on the same machine, and it
doesn't happen with IE on a Windows XP machine.

And please, don't bother suggesting I have the users use Firefox. Other
web based applications they use require IE, and these are normal
everyday office workers. I don't want to overload them.

Any suggestions?