I was trying to scan in a photo at 1200 dpi since it was a tiny photo from the 1920s. I guess initially I didn't realize I could do a preview on my scanner and then limit the scan size to just the photo. So initially I was scanning 8"x11.5" which my 2 GB computer was obviously not able to handle. Paint.NET would start the process but never finish. Some of it still seemed to be running however as I could move the various windows around and the screen would still look OK. Even the cancel button did not work however and eventually I was forced to kill the process thus losing all the photos scanned but not saved up until that point. I'm wiser now but is this a known problem - or could I have done something to rescue my unsaved photos?