If you also have this scenario, for some reason you need to disable the DHCP client service (DHCP) on all machines since you are using static IP and your policy dictates that you can never get DHCP. How about Windows Audio Service (AudioSrv)? And those service may be started by the end user if he/she has local admin rights to launch services.msc
With Group Policy Preferences on Windows Server 2008 Services Extension you can accomplish this. Like on my first post, you need to navigate thru the GPMC then on Control Panel Settings, choose Service, right click then New Service.
What we would do now is to place the startup type to disabled, choose the service name via the ellipsis (…)
For the Service Action I will stop the service and click apply, then okay.