I have been having a lot of trouble with Solid Edge 2D not responding (as indicated in Task Manager). The only way out is to end the task. In fact when I open Solid Edge, nothing on the menu seems to work when I click on it. I have to open the file from the recent files list to work at all. I can sometimes only go for a couple minutes before it freezes again. I did not have this problem when I started using the program, only lately when I went back to it after a month or so. I have a refurbished Windows 7 Pro Dell computer that I bought to use mainly for this.