Typically, you want to use the strongest encryption available in Windows 7 to protect the files on your home network. If you have a device that does not support the maximum encryption setting in Windows 7 (128-bit), however, you may need to change the default setting to a lower encryption level (40- or 56-bit) in order to share files with that device.


Open the Windows Control Panel, and then click Network and Internet.

The Network and Internet window appears.


Click Network and Sharing Center.

The Network and Sharing Center window appears.


In the left pane, click Change Advanced Sharing Settings.

Windows creates separate network profiles for each of your networks (for example, Home or Work and Public).


Under the profile you wish to change, scroll to the File Sharing Connections section and click Enable File Sharing for Devices That Use 40- or 56-bit Encryption or Use 128-bit Encryption (default). Click Save Changes.

Windows 7 saves your changes to the file encryption settings.