Ehh It's not really like Stealth Settings from Yahoo! Messenger, but it's a simple method by which to make your computer invisible for other users in Network Neighborhood / My Network Places.
Instructions :P
1. click Home and select Run.
2. In the Run box, type cmd and press Enter or OK to open Command Prompt.
3. write in Command Prompt : net config server /hidden: yes And press Enter .
"The command completed successfully."
Your computer is now 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).