The quickest way i to use Services, from the Start/Programs/Administrative Tools/Services
That lists all services running on the machine and you can right click and restart or stop/start as needed.
I would highly recommend if you are going to use a windows server for production web hosting that you get some reading done on services, patching, and firewalls as quickly as possible. Microsoft has some free training guides also that will help.
You can also get to services MMC by going to start, run and typing services.msc
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