Issues with my Surface

I started experiencing some problems with my Surface today. The device works fine as long as I am using it but when I put it aside it randomly reboots sometimes. So when I pick it up again and log in, a message appears telling me that the Pc had to be rebooted due to a problem. I have taken a look at the event log but am unsure what to conclude from that. Also one time today I had WiFi issues and noticed that the WiFi adapter was disabled for some reasons and I was unable to enable it. Not even the troubleshoot wizard could help and I had to reboot the Surface to regain WiFi connectivity. I cannot remember exactly if that happened before or after the above issues started. Event log Any ideas what could be wrong?