My work computer is severely messed up due to the upgrade glitch. They might have to do a complete reinstall on a computer which is only a few months old. I spent 3 hours with IT and it still won't boot into Windows. The IT guy said that he personally fixed 600 computers today. The rest of his team also did hundreds. Our company still has more than 1200 computers which are still down. What a mess caused by 1 failed subsystem update.