I'm not on a domain , just using local Windows 7 homegroup netowkr , But I want to prevent users from changing the DNS from the network settings , i'm using OpenDNS to block certain websites currently the only way to do this is to switch their account into standard users and restrict the access via group policy editor but we have some program/applications that require administrative privileges maybe there are other ways to prevent them from changing it ? or maybe a program/software ? Thanks