Windows 10 Fall Creators Update
Completely fucked up the color calibration on my monitors, yielding some comically overcontrasty nightmare. I went in and adjusted it back to somewhat normal (look for color management), but FYI for anyone doing the update as apparently this is fairly common.
It took forever for my laptop to update. What are the changes from regular Windows 10?
Did the same for me; I went into the monitor calibration tool and it basically defaulted back to normal at that point.
These big Windows versions are effectively full service packs -- they don't number the versions anymore but we'd be on 10.3 or something by now.
It broke the printing on my mum's PC, I'll have to go and fix it this week. It's also causing login problems on my wife's laptop.
It didn't affect mine because I got fed up with the garbage MS produce and switched to Linux.
If you have multiple PCs to update, your best bet is to download the latest .iso and reinstall from that.