Windows 7: Hiding Host Name from Router

You could try unchecking "Register this connection’s addresses in DNS"
Chapter 9 - Windows Support for DNS



However, I doubt that will work because what you want is completely pointless. If you are so concerned about what someone might learn from a unidentifiable computer name then stuff it full of random junk. But a computer name is just that, a computer name. If it provides personal information well that is your own fault.

Also, tin foil hats are on sale at K-Mart right now. Better hurry before they run out!

information much apprecited guys...

as for wanting to hide private info, believe me, if i wanted that, I would have a different machine and not use g#mail!
I was at the least, interested in the process of controlling windows more than it tends to allow.

And as for my tin foil hat...I am thankfully nowhere near a k-mart - and regardless, I have a much higher reflectivity mylar cap laying around here somewhere (though thinking on it, maybe the scrunched up foil helps add a stealth effect...hmm)

thanks again

in Windows 7:
Control Panel -> System and Security -> System
lots of interesting stuff there for you ^_^

I found this today, looking for the same solution:

How to hide or unhide computer name on network « NETWORKING!

You'll have to run the command prompt as administrator.

From that article:

How to hide or unhide computer name on network

To Verify and See if your Computer Name is Hidden or Unhidden

• Open Command Prompt
• In the command prompt, type Net Config Server and press Enter. (See screenshots below)
• If it is hidden, then you will see Yes to the right of Server hidden.
• If it is unhidden, then you will see No to the right of Server hidden.

To Hide your Computer Name from Displaying in Network

• In the command prompt, type in bold below and press Enter.
• Net config server /hidden:yes
• You will get a The command completed successfully message afterwards.

To Unhide your Computer Name to Display in Network

• In the elevated command prompt, type in bold below and press Enter.
• Net config server /hidden:no
• You will get a The command completed successfully message afterwards.
• Exit Command Prompt then Restart the computer to apply.