hah, same thing happened to me last nightpic.twitter.com/cvQAyvyHYi
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(ended up installing fine though!)
I mean that stands to reason
*looks down, laptop is gone*
I've been putting off upgrading for fear of this very thing happening 
mine did the same. Then got stuck on a black 'buffering' screen. Had to hold the power button, but it worked out in the end.
/r/SoftwareGore is leaking
[biden cross]
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