Game wont launch.

[Leftus]

So I got a new PC.
Anyways, when I try to launch the game, it gives me an error message saying:
"Could not find the main class:
C:\Users\asdf\downloads/autohaven. Program will close."

I have also been having problems with java in general. Things that use java won't run and attempting to reinstall or uninstall prompts me with an error.
Any help?

[loftar]

You're probably trying to open the JNLP file with the wrong program for some reason. You should open it with the "javaws" program, not "java" or "javaw".