"Hey Cortana" is off by default. You need to turn it on in the Cortana settings (open Cortana search from the taskbar, choose the "hamburger" at the top, select Notebook and then Settings - yes it's...

Have they been deleted from your OneDrive or just locally from your PC? (you can check online at onedrive.com)

Windows 10 has a new OneDrive experience since Windows 8. So you need to reconfigure...

My first guess also was that your monitors were arranged in the wrong order, as snapping between two monitors is actually more difficult than dragging it. I suggest logging a Windows Feedback item...

Hi All, Microsoft is aware of this issue and has a team working on it. I don't have an ETA for a fix, but those involved agree this experience needs improvement. Thanks for the post.

Jeff