It's happened to me as we'll tonight. I read of the update. Started the machine and went to sign in, prompted to update. Agree.. Update go as normal. Asks if I want to restart afterward automatically, I agree. It installs... All normal.. But then it turned off and never came on. I tired to turn it back on myself.. It turns on about 2-5seconds, beeps and shuts off with a strange blinking red light after. I'm very very not happy! Hard to believe it would be a coincidence that the systems just happen to fail after the update. Also to what is obviously not just me.