Are you using the media creation tool?
First I did, but when that burned a DVD and seemed to do nothing else, I instead clicked their upgrade link that started the upgrade.
It's interesting. After 5 hours, it finished - and nothing. No reboot no message. I used the PC for a while, figured oh well it didn't work and left it alone for hours.
When I came back, the Windows 10 login was up.
So, I'm on Windows 10 and it completed.
First impressions: where it's the same, good. My logins were disactivated on web sites.
The biggest thing I'm seeing and not liking is the aggressive marketing. I feel like they're treating my PC like a portal for their revenue.
Tools try to switch my applications to theirs, default preferences are set for them to collect all my data and advertise, they have windows pushing things.
The look sometimes I don't like as much - sometimes it's a bit dark, black coloring.
The only other issue I've noticed is sometimes when I click things there's a couple seconds delay before it notices. It's intermittent.
The start menu, 'most used' sure isn't. Programs I run daily aren't on it, a program I haven't used in months and rarely used is. 'Recently added' is some DVD player I didn't run.
And I said 'no' to Cortana but there's this banner ad nagging to click it anyway on the screen.
It's next to the start button without a close button.
So, I saw someone say you only have 30 days to go back to Windows 7? If that's the case they sure hide that information.