MacBook restarting my itself?

[Hankster]

I searched around and didn't find a thread on this. My MacBook has been restarting by itself when it's left alone for over an hour plus. When I go out and leave it on (I have screen saver turned off) for more than an hour (guess) my MacBook is back at the login screen.

Thoughts? Is there a setting I'm missing???

 

[jeremy.king]

To verify it rebooted, try the following command in Terminal next time you notice it:

uptime

Do you have Fast User Switching enabled?

 

[Hankster]

Last login: Mon Jun 16 14:25:02 on console
myname-myname-macbook:~ myname$ uptime
15:01 up 6:50, 2 users, load averages: 0.55 0.58 0.46
myname-myname-macbook:~ myname$

This is what displayed when I did the command. Oddly, it says "2 users" and there is only one user - me.