I've just found why I'm having the problem with jedi knoight 2 in multiplayer. It's the refresh rate tool. When I'm playing online with the tool installed it totaly locks up and I have to totaly turn off the pc(the button on the tower itself) to get the pc working again. I put everything back to defults and uninstalled the tool and it worked no problem. Does anyone know how to fix this? I thought it may be fixed in much the same way that battlefield 1942 is but I can't figure it out.