I've had two problems since I started using the Lenovo Ideacentre Y900-34ISZ I typed this post on earlier this month. The first is that the Wi-Fi connection in my house has started failing, only to typically come back one or two minutes after the failure. The second is that my computer has been spontaneously restarting after a brief freeze. Typically, the latter of these two problems only happens when I'm playing a game, but just today, the computer restarted while I was simply browsing the Internet. Disabling automatic restarts appears to only leave the computer frozen, though I've always turned it off manually in that situation, so I don't know if the freeze would otherwise be temporary. One time, it happened to freeze at a time when I was running HWMonitor (and a game), and as far as I'm aware, the CPU was at acceptable temperatures (~50°C) when the freeze happened. I have no idea what could be causing these frequent restarts. I also can't help but wonder if the Internet problems are connected (though I have no idea how or why they would be, let alone how or why my new computer could temporarily disable the Wi-Fi network for every device in the house).
If anyone willing to help needs additional information, they need only ask, and I shall answer to the best of my ability.