<p>Apparently, this is a problem which has something to do with multiple screen users. One of the solution that might work is : unplugging one of your screens, do the update, restart and replug your screen. I would advise you, or others to wait out the problem and update once it is fixed.<br>
<a href="http://i.imgur.com/Ed2ehIK.png" class="onebox" target="_blank" rel="noopener">http://i.imgur.com/Ed2ehIK.png</a></p>