Rpc server is unavailable in cmd

tmnsquirtle

Distinguished
Nov 16, 2011
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18,510
Hello, im trying to forcibly end a protected program in the windows 7 cmd (taskkill /S system /U domain\Owner /F /PID) and it is telling me that the rpc server is unavaliable...
i might be doing the "/U ______\_____" part wrong, dont really understand that. any help? also appreciated would be knowing how to forcibly & permanently delete/cripple a program.

thanks! :D