Sharing Folders in Windows 7
Vista and Windows 7 allow some fine-tuning of what is shared, but note here that Windows 7 has a concept of “Homegroup" that is not shared with XP, and only partially shared with Vista. To demonstrate this, connect your Windows 7 PC to the new network. Go to start → Control Panel → “Choose homegroup and sharing options" (under Network and Internet). It will inform you that you are not currently connected to your homegroup. That is correct. The PC is connected to the group you created, so nothing in this dialog applies. (Windows 7 actually automates homegroup setup – but only to other Windows 7 computers. Since we have a mixed network, we don’t want to use this feature.)
So instead, go to Start → type in "View network status and tasks" then click on the option. This will open the Network and Sharing Center page. On the left, click “Change advanced sharing settings."
On the next page, you’ll see several options. Remember again that the brunt of security in our simplified home network is the router network password, so we don’t want to get too fancy on this settings page. “Network discovery" should be turned on, as should “file and printer sharing." You’ll need to decide how your “Public" folder is handled, but note that this is public only in the sense that is open to others on your network, not to the big, bad Internet. If you want other users on the network to be able to place files in your public folder, then you need to select “Turn on sharing so anyone with network access can open, change, and create files."