If you do not want to wait for Anniversary Update (which will be released in July 2016) or if Active Hours is not a solution for you, you can permanently stop Windows 10 reboots after updates are installed if you follow the steps below.

via How to permanently stop Windows 10 reboots after installing updates

Just bought a refurbished I7 machine with Windows 10 Home edition to use for gaming  and run VMs via Virtual Box.  The VMs need to be up 24/7 if they are an active unit.   This box has a lot of RAM so it can run many VMs.  Microsoft brought them all down last night with an update then reboot.  This is totally unacceptable.  Most of the solutions on the web using gpedit.msc or regedit do not work on Windows Home since we are the lowest OS on the MS totem pole.

The procedure in the above website worked for Windows 10 Home.   Now I just have to wait a week or so to see if it really stops the auto reboot.  I don’t mind having to queue up updates that require reboot.  VMs  need to be shutdown gracefully.  Many people use their computers for doing things other than consuming mass media.