During the race tonight the game returned to desktop no less than 4 times.
Is any software doing it? I have had that issue with auto warning message before from anti virus, other security software, low battery warning on a wireless mouse and an auto pop up message from my audio driver when ever I unplugged or plugged in audio devices such as headphones (so if it was not plugged in properly I got repeated messages). Not all of the warnings were on the screen for long enough to see it before the PC went back to the desktop.