Solved Services.msc Settings Greyed Out

Hi,
So the problemis that i need to change an option for a service but i cant its all greyed out i cant do anything i tried to run as admin but didnt work, so i'd be thankful if someone helps me.(sorry for bad english i was in hurry)
Screen Shots:

Thanks.

Try using sc.exe to do the same thing. If that also fails it may help locate the problem. In an Administrative command prompt run
sc /?

for parameters.

You cannot change the parameters of the RPC service from the services module.

This link will show you how to change it in the registry editor, msconfig or Admin command prompt Start/Stop Remote Procedure Call (RPC) service in Windows 7 from Services, Regedit or CMD

The appropriate variables for changing the settings are included.

Thanks every one for the reply,
Yes i was able one time to edit it from the registry but now i want to edit the log on as tab to Local system account, so can you help me with it in regedit?

Why do you want to change the parameters of the RPC service?
This is a very critical service with many dependencies.
There is a reason why the service manager will not do this. If the account of a system service is changed it may not be able to perform it's assigned task or you may compromise security.

I solved it thanks every one.