Up until recently, my Lightroom 3 program has been working very well. However, for the past couple of weeks, especially when I am editing a picture in the Develop Module, the computer will spontaneously shut down and restart; I had one incident of this with Photoshop CS 5 Extended also. I have no idea how to fix it. I have deleted the program and reinstalled it, and even started a new catalog. If I had to pick one activity that causes it to do this, it would be using the mouse to adjust highlights or saturation. Any advice you can offer me will be greatly appreciated. I am operating Windows 7 and I have downloaded the latest version. I have more than enough RAM and I don't think my computer is hot. No other program I run does this.