Copy the below code into notepad and save as whatever you like WITH A .vbs extension. Then double click on it. This one references the static c:\program files\symantec client security\symantec antivirus path you referred to. Do you clients have other install locations? I'll get you a new one that scans several directories here shortly. Try this one out on a machine though. This will always be dependent on the SMC service NOT being password protected. If you ever decide to do so, it is a very simple edit to the code.
strComputer = ""
strMsg = "This script will restart the SMC services on the remote machine."
strComputer = UCase(Trim(InputBox(strMsg,"Enter Target Computer Name", strComputer)))
If Len(strComputer) = 0 Then
WScript.Echo "Machine name not specified" & vbCrlf & "Terminating Script"
WScript.Quit
End If
Set objShell = CreateObject("Wscript.Shell")
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2:Win32_Process")
intReturn = objWMIService.Create("c:\program files\symantec client security\symantec antivirus\smc.exe -stop", Null, Null, intProcessID)
Wscript.Sleep 10000
intReturn2 = objWMIService.Create("c:\program files\symantec client security\symantec antivirus\smc.exe -start", Null, Null, intProcessID)