just create a batch file to do it and schedule it to run at whatever interval you want to check.
for example - this would check for a service called Symantec AntiVirus Client to be running (findstr is case sensitive) and would restart it if if is not running.
net start | findstr /C:"Symantec AntiVirus Client"
if %errorlevel% == 1 goto restart
:end
exit
:restart
net start "Symantec AntiVirus Client"
-Dave