I have a Dell laptop and installed the free win10. Since then when put into 'sleep' mode the laptop crashes to a black screen when woken up. It sleeps but needs to rebuild programmes before rebooting. It also removes the McAfee virus protector from the tasks installed. IMHO Microsoft needs to sort this out asap or many users will soon revert to Win 7.
Edge works well but that too crashes after several minutes of use. I have returned to using Firefox on Win 10 but that too will soon be returned to Win 7 unless the 'sleep' option is supplied by a Microsoft update very soon !