HI everyone. This has been happening for a while and is frustrating. I don't believe it always did this on this computer. With the program open and a drawing open, whether a new blank or large project it doesn't matter, the program will close after about 5 minutes or so on it's own. Giving no chance to save it. Yesterday with the program open but no drawing open, it stayed up for a long time till I closed it. My little 11" laptop does not do this. The suspect computer is running windows 10 64bit and this is TCad 2016's most recent update. I deleted the built in folder already and that didn't do anything. I am thinking I am looking at an reinstall but am hoping to not have to do that. I also have TC 14, 18, and 2015 installed. Anyone have any ideas?