To restore base settings for services (and other security settings, like systems file rights, regedit right and some keys) Execute that from a new "cmd" secedit /configure /cfg %windir%\repair\secsetup.inf /db %windir%\security\Database\secedit.sdb /verbose After operation complete, REBOOT. Goodbye. edit: Third-party services (like AV, firewall aren't modified ...)