LAN FILE SHARING TECHNIC IN WIN 7 & 8

Follow the  steps

1. 
   1
   Point to the system tray and right click the network status icon.
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2. 
   2
   Click Open Network and Sharing Center.
3. 
   3
   In the upper-right of the new window, click See full map.
4. 
   4
   The new page is prefaced with, "Network map of (Wireless Network Connection - <name of wireless network>)".
5. 
   5
   In the network map, you will see your computer's name, the name of the router, the internet, and possibly the names of other connected computers.
6. 
   6
   There may be a checkbox entitled, "Click here to see all other devices." it will probably show more users on your network.
7. 
   7
   Double click one of the other computers.
8. 
   8
   Now enter the login information for the network computer.