Try installing a few apps and restart your phone. It isn't a permanent solutionUpdate: Hard reset worked for me and I was having the same issue with an HTC one.
Yes, Microsoft Windows Phone Recovery Tool.
For what it's worth the recovery tool didn't work for me. When I restarted the phone went to a screen with a lightning bolt and a gear and got stuck. I eventually gave up and did a hard reset and it seems to be working, but I couldn't get it to rollback to 8.1. So I hope this is semi stable because it looks like it would be a pain trying to roll it back.
This happened to me before, you have to use the recovery tool and try the process again.
So it was just done installing but i have a major issue: my startscreen won't load.
I can use the notifications dropdown and hold back to show (empty) taskmanager but thats it.
I had an issue while installing that it wouldn't reboot (it powered off but didn't turn back on again) and now i have this issue.
More people with this issue? And does hard-reset help?
I was checking out the settings and restarted one time and checking out the settings again. After a while (a minute or 4/5) the start screen came up. Then I changed the start screen to show more tiles and I got the 'Loading...' back, but now it took only a minute or so.
Now the start screen is always instant available...
Edit:
Some one else reported 20 minutes of 'Loading...' before the start screen showed up...
After how much time did the start screen show up? And did you press the windows button after doing the settings? Because nothing is working for me. I don't want to hard reset but I guess that's my last option.just goto action center>settings>personalization>start> and change from full to tiles. also switch off show more tiles and change the background to some pic.
you can revert back to full once the start screen is loaded.
(this was the only method that worked for me)