To those of you saying these are Win10 issues, I disagree. It may be related to the hardware/drivers that MS chose to use on Win10, but I don't think it's Win10 at all. The SP4 is my 4th Win10 device (others are SP1, HP Envy (8.1 upgrade) and a $60 HP Steam that I bought from Woot with an Atom processed). The other three devices work fine - no issues whatsoever. None. Meanwhile, my $1400 SP4 takes over two minutes to boot up, loses connectivity to keyboard, has the display driver crashing constantly and other various issues. I'm very disappointed and I hope MS fixes this soon. The product should not have gone out the door this way.