// SFC relies on the "TrustedInstaller" service: http://www.winhelponline.com/blog/fix-for-error-windows-resource-protection-could-not-start-the-repair-service-when-running-sfc-in-vista/
if{not exists running service "TrustedInstaller"}
waithidden cmd.exe /C net start TrustedInstaller
endif
// Run the System File Checker Utility
// http://support.microsoft.com/kb/929833
continue if{exists running service "TrustedInstaller"}
waithidden sfc /scannow