I have a Dell Vostro 3500. When I leave my laptop without doing anything while it turn on, after about 30 minutes, most of the time it is starting to doing the SA (SupportAssist) automatic diagnostic check itself. I inserted image is shown after the diagnostic check each time. My problem is when I press continue the laptop start to boot from the beginning. So my unsaved works are gone. One day this happened while I was exporting my video project. So after the diagnostic check even my project was gone. So please help me someone who knows how to stop this diagnostic check or someone who knows any other solution for this problem. Very sorry for my poor English.