You can combine the stop and start of a service into one command by using the following:
C:\>net stop spooler && net start spooler
This is effectivly the the same as doing a restart of the service from the services control panel app.
Just remember if the service name has a space between it to enclose the service name in speach marks " ".
i.e. net stop "service name" && net start "service name"
Clear the print spooler
C:\>net stop spooler && del /q %WINDIR%\system32\spool\printers\* && net start spooler
Stops the print spooler service, clears out all queued print jobs, and restarts the spooler. This will fix a LOT of printer issues.