I wrote this for laypeople like myself, so it might make a techie or two roll their eyes. I had the same problem as everyone else on this thread. In my case I could type in my password, but nothing happened when I hit enter, clicked "next", or tabbed to "next" and hit enter. If I waited about 60 seconds and clicked "next" I got a loading wheel which spun indefinitely until I clicked "next" again, and the my screen would go black for a number of minutes and then rebooted to "Welcome back". After around 6-7 restarts I got on google with my phone and found this thread, and like everyone else it was my USB wireless adapter driver messing everything up. My adapter is an Etekcity 3072 I picked up on amazon (from what I've read a lot of folks with different adapter brands are having this issue). After a forced shutdown (held power button for 10 seconds) unplugged the adapter, and restarted. This got me past the welcome screen, I then did a custom set up and disabled all of Microsoft's spyware (which was every option just to be safe, I figured if there was something I want to try I'll research it more thoroughly later, in my case though it seemed like I had everything I needed already). After your desktop fully loads up, if you want to avoid a lot of headache, before inserting your adapter to get back online, either insert your driver disk to uninstall your usb wireless adapter driver (I just clicked the "exe." file and it found the driver was already there and offered to uninstall it), if you do not have the disc someone else said to reboot in "safe mode" (hit F4 when rebooting) and remove the driver from "device manager" (I could not see it in normal mode when I looked). Once you have removed your driver simply plug in your adapter and it should work like any "plug and play" device, and you should be online, now head to settings and "update & security" to check for updates.
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