I have a question. I am using Avast Free 5.0 with Windows XP Media Center 2005 Edition (SP3). When I install Avast, “Builtin” is automatically added to local security policy “logon as a service”. I’m thinking for some reason Avast has to use some Builtin account/service in order to function. Has anyone else noticed this behavior. Any information about this local security policy change would be greatly appreciated.