No access to other computers and devices on the LAN under Windows7

In a local area network, if our computer cannot access other computers and devices on the LAN under Windows7, but other computers can view my shared files, how can i solve this problem

Open the properties of the network neighbor, the second item in the left network task ' setting up a home or small office network '--' next '-' next '-' the computer connects to the Internet through a residential gateway or other computer on the network '--Your computer name (casually but not the same, It's a good way to differentiate yourself from another computer. Computer workgroup name--enable sharing--complete the wizard

This can also be shared if you want the local disk d,c,f want to share the words, find the disk you want to share, right mouse button--Properties--shared--If you know there is a risk but you want to share the root directory of the drive click here--Share this file on the network--OK, that's it.