How to share a folder, in Windows 7

1. Select a folder in Windows Explorer, right-click and choose "Properties"
2. In the Properties window select the "Sharing" tab.

You should now see the following window.

Click the "Advanced Sharing..." button.

This window should appear. Tick "Share this folder" and then enter
a Share Name that this folder will be known by on the network.
By default, the folder will be shared for read-only access for the
user who creates the share. If you wish to change this security, click
the "Permissions" button and choose the level of access that you require.