I was sitting here last evening, fat dumb and happy, on my Macbook Pro completing some work and needed to run an app in Windows. (I'm running the latest Parallels with Windows 10) After bringing up Parallels and Windows 10 starting up, of course, I had updates.. the updates downloaded and then started the install process. A request to restart popped up so I restarted Windows 10 as requested. Up it came no big deal. Then more updates... then the fans started running up ending at full speed, then I felt the heat from the Macbook on my lap. It got hotter and hotter fans now running flat out. I quickly tried to shut down Parallels but nope it kept running. Before I could get up to the Apple logo to select "Force Quit"... poof.. my Mac died. It was so hot it shut itself down. I was not aware it had the ability to do this but obviously it does. It was so hot.. and fans still running but slowly now I stuck it in our freezer to cool it more quickly. My Macbook came back to life after a few minutes in the freezer and is now running fine again but it scared the hell out of me; not wanting to spend a bunch of money on a repair or a bundle on a new Macbook. I brought up Parallels again and let Windows 10 finish its updates IN THE FREEZER. All went fine. This brings to mind now why those building PCs add so much cooling. Water coolers, multiple fans etc and I wonder if Windows 10 is now so poorly written and the IO so extreme a mere Macbook can barely handle it any more. MacOS doesn't do this... Linux does do this... Solaris doesn't do this only Windows. WTH..!!!