Windows 10 is horrible. Its a bug-ridden privacy invasion fest of the highest order. I realize that many working people are stuck within an abusive realtionship with Redmond and will be forced eventually to upgrade because they need Office 20XX.
There is no need to be nagged to upgrade now though. And if you are a sysadmin its likely that you are going to want to stop the notifications on your network or risk someone clicking to upgrade and not being able to use their machine for a few hours.
I have a little batch script that I can run on machines that log in to my network that just disables the update that shows the notifications — it is just 2 lines but it saves a lot of faffing with regedit.
TASKKILL /IM GWX.exe /T /F
REG ADD HKLM\SOFTWARE\Policies\Microsoft\Windows\Gwx /v DisableGWX /d 1 /f
Save that as "disableFuckingIrritatingWindows10UpdateNotices.bat" or incorporate it in to your login process and your users should stop seeing annoying update notices.