i use cable, to connect with router
To make a few things clear.
Seeing the other computer is a first step.
It does mean the network is setup right.
What is needed next, is to allow a user from one computer access to the other computer.
In your case I assume you don't want to restrict certain users, but only want to able to access the shares yourself.
Getting access to a shared folder on another computer is much like login in to a computer when you are sitting behind it.
You need a username and a password.
The computer you try to connect to already has that.
It's the username password you use to log on to it.
Ok, now we have that cleared I'll show you how to go about it.
To make this easy I will give an example.
Suppose your desktop's computer name is
desktopPC
Suppose your username on the desktop is
budis
Suppose you have a shared folder on the desktop named
desktopshare
1. On the desktop pc open explorer and go to the shared folder (desktopshare).
2. Right click on it and select properties.
3. Chose the sharing tab
4. click on advanced sharing,
5. click on permissions.
In the list you see "everyone".
You also see three checkboxes,
6. click on full permissions.
7. click OK until you are back to the explorer.
8. Close the explorer.
Now go sit behing your laptop.
In network you see the desktop named
desktopPC
1. double click on it
2. in the dialog that appears first click on "... different credentials..."
3. in the following dialog chose different user, fill in the user name and password you use to login to the desktop!
Click OK.
That's it.
Good luck