https://support.microsoft.com/de-ch/kb/182569
https://social.technet.microsoft.com/forums/windowsserver/en-US/cd9e1fc2-e209-49f4-ae4a-78222969c6b2/some-settings-are-managed-by-your-system-Administrator
http://www.askvg.com/how-to-change-windows-update-settings-when-managed-or-disabled-by-system-administrator/

http://blogs.technet.com/b/chenley/archive/2011/03/10/how-to-turn-off-ie-esc.aspx
https://community.hpcloud.com/article/how-disable-internet-explorer-enhanced-security-configuration-your-windows-instance
https://4sysops.com/archives/four-ways-to-disable-internet-explorer-enhanced-security-configuration-ie-esc/