MBA just restarting on me on its own

[RichardF]

I am messing around my FiOS Verizon Routers' settings over WiFi and I have about 5-6 programs running, one of them is Transmission. And all of a sudden my MBA restarted on me.

It's highly suspicious. Can someone help me by telling me where to look in th elogs to find out what caused it to restart?

 

[RichardF]

It appears the computer didn't restart. I was just logged out as user (presented with a username/ password screen).

I am looking at the System logs.

Chrome and VMWare Fusion seemed to have caused trouble.

Prior to being logged-out, I ran a speedtest and clicked by mistake on a button ("start now"), it was a stupid ad offering to run a scan of my Mac. I was on the phone/ distracted, browsed back (without clicking the scan button) and shortly after I was logged-out.