Hi,
I haven't got a reboot problem, my unit goes in suspend /standby mode, radio and backlight turned off, and it happens after 30 minutes. When it happens, I have to extract the display, insert it again and then it wakes up, and then I have to press the src button to wakes up the radio again. When it wakes up, IGO is still running in background, so it is not a reboot but a suspend / standby event.
About the builtin navigation software, it starts a process called "HMIManager.exe", it is the Main program and it is located in My Flash Disk\PRG0. HMIManager.exe starts navi.exe, tel.exe, voice.e