Can't establish office Network with windows 7

#1
I'm trying to network 2 computers together in our office. The computers are HP's P6000. When I go to computer A I can see the folders on computer B.And it's the same when I go to B I can see A but I can't access any files. I keep getting the I don't have permission prompt to access the computer (that's on both computers). I changed the settings and passwords, followed the directions from the Microsoft website, tried to Google the answer, but I still get the same prompt.

Thanks for the help
 


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