Windows 7 2 comps on homegroup

[Bobcoop103]

I am having nothing but trouble trying to setup 2 win 7computers on a network, I tried using the Homegroup instructions but get onlypartial success. When using #2 computer to look at #1 I can see onlypublic files and when at the #1 computer looking #2 I am asked for a username andpassword and I have no idea what they are and I cannot see the printer on #2 computer. All I’m trying to do is share allfiles and a printer between 2 win 7 systems. So my question is, can I deletethe existing homegroup and start all over? Any help would be welcome.
Thanks, Bob