Ehh ... It's not that Stealth Settingsfrom Yahoo! Messenger, but it's a simple method by which to make your computer invisible for other users of Network Neighborhood / My Network Places.
1. click Start and select Run.
2. in the Run box, writecmd and press Enter or OK to open Command Prompt.
3. write in Command Prompt : net config server / hidden: yesAnd press Enter .
"The command completed successfully."
Now your computer is invisible in Network Neighborhood! :)
Once set invisible files in folders share They can not be accessed by other users of LAN unless I know the exact path of the folder share the name of your PC. (\\ Computer name \ share name).