Updated to Windows Creator's edition yesterday - didn't have much choice because it had already started while I was away from the computer for a bit.
I've noticed two things that previously worked perfectly which don't now. The search function in Outlook (the email program) is dead as a door nail. And it's virtually impossible to shift windows/applications by clicking on the application icon in the taskbar at the bottom of the screen.
The update also destroys the homegroup and undoes all sharing choices for all folders. It neutralises previous choices with regard to sound options (which input to use, preferred volume etc.).
You'd think retaining these choices would have been child's play for programmers, but they're ignored every single time a major update is rolled out.
I'm going to test whether the latest update (2018-03 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4089848)) rectifies the situation, but I doubt it. In which case I'm rolling back to version 1703.