If you suddenly can NOT edit or change some of your Windows 7 or 8 or 8.1 options because of this message so here’s the easiest way to solve it!
First it could be your Security or Firewall application problem, Like BitDefender 2015 “Profiles” feature/option which disable some Windows features to boost your computer! yes, after disabling “Profiles” it will solve the problem.
But if it didn’t so here’s the another solution..
“Some settings are managed by your system administrator” Message
Enable or Disable “Toast Notifications” using a REG File
The .reg files below are for the registry key and value below.
0 = Enable toast notificaitons
1 = Disable toast notificaitons
Just download the following REG file, install it then restart your computer!