Microsoft Windows Server Update Services 3.0 SP2 (WSUS)

I typically work as a systems engineer in the SMB sector and WSUS is one of the products that in my opinion is a no brainer to implement. It’s free with Windows Server 2003 or 2008 (and Vista & Windows 7 I’m told, although I have not verified this). It can easily be implemented by your present IT staff and can reside on an existing IIS webserver server as long as there is enough local disk space to hold the updates.