Automating sfc /scannow to a button

Im trying to do as the title says just for automation purposes on a button

But im hitting the 

Windows Resource Protection could not start the repair service. error

so i added the netstart command to make sure the service is started but i still cant get past the error even though the service is started

            Case $T4SFCScanButton3
                Local $netstart = RunWait(@ComSpec & " /k " & "net start trustedinstaller", "", @SW_SHOW)
                Sleep(2000)
                RunWait(@ComSpec & " /k " & "sfc /scannow", "", @SW_SHOW)

Anyone know a way to get round this?