Ok, the logs show you are on Windows 7.
So do you get the error when tring to view a computer or share AFTER you open network, or is that the error you get when you click on network?
Also, if you know the computer name you are trying to connect to, see if you can access it this way, go to the start button and in the search box at the bottom put in
\\ComputerName and hit enter.
Replace ComputerName with the name of the computer you are trying to connect to, like my Computer name is SMC so I would put \\smc
Let me know if you get the error there as well.
I have found a number of things that can cause the problem, so need to try and narrow it down
Shane