|If you have a Windows Active Directory integrated domain there are two ways built into Windows to allow you to send out software to clients. If you do have an AD domain, get over to MS's website and start researching.|
If you don't have an AD integrated domain there is 3'd party software out there that can help you do so. The one and only example I can think of off the top of my head is Altiris:
Remember, Google is your friend
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.