Windows 7 share without password.
To turn off Password Protected Sharing:
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1. Click Start, enter “Network and Sharing Center” in the Start Search box .
2. Click “Change advanced sharing settings” in the left pane.
3. Make sure that “Password protected sharing” is turned off.
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Win7 when configured on peer-to-peer Network has three types of Sharing configurations.
HomeGroup Network = Works only between Win 7 computers. This type of configuration makes it very easy to Entry Level Users to start Network sharing.
Work Network = Basically similar to the previous methods of sharing that let you control what, how, and to whom folders would be shared with.
Public Sharing = Public Network (like Internet cafe) to reduce security risks