I picked up the i5 /8gb ram, 256gb storage on Tuesday.  It did a couple sudden power offs on day 1 and 2, updated 4 drivers and bios and it seems to be OK, but today noticed a blue stuck pixel (on black screen) about 1 inch down in center.  So I'm debating exchanging this for another.  What is frequency on these stuck pixels?  I don't want to get a worse one of course.  I think at that point it will be a final return.  I haven't seen stuck pixels on many electronics in some time (70" Vizio, motorola phones, other i3 laptops, chromebooks, etc.), so this seems strange for a higher end item.