The clue is so limited that it's difficult to figure out what's going on.
I assume that your Lookout is 6.0.2 with updates. Does Lookout crash with only one specific process? If you run a new process, with some panels, some controls, maybe opc objects, will it crash?
Have you ever tried to repair/reinstall Lookout? If it doesn't work, you can try another computer. If Lookout crashes on different computers, it's the Lookout issue. Otherwise, I guess it's the windows issue.
Ryan Shi
National Instruments