Unit has the 2.08 software.

The unit is rebooting when I touch the settings button. Sometimes it shows and error window saying something about the systems function has performed an illegal operation, but mostly, it just reboots and still won't let me change the setting. It doesn't do it all the time. I have to shut the key off and let the system boot then I can go into settings about 1/3 of the time.

Any ideas?