I have a small setup of Windows 2003 server in my office. Our network consists of Windows 2000 and Windows XP client computers. I have usually the habit of checking network statistics on each computer that I go before I start my work. All the time I have noticed port 445 occurred in the statistics and I do not understand what function it does. Can anyone tell what is port 445 used for on W2k/XP/2003 computers and can I stop it?