Shared folder "Access is Denied" between Windows computers

As I can see from your description you want to share a directory.
Since you use Windows 8 and I can see the "Security" tab you are using NTFS-filesystem.
It seems like you didn´t configure NTFS-permissions.

• Click on the "Security" Tab of the Folder you want to share.
• Then "Edit..."
• In the new window click "Add..."
• In the new window click "Advanced..."
• In the new window click "Find Now..."
• Select the user who needs the permission to acces the folder.
• Go back to the "Permissions for " dialog.
• Choose the user you added.
• Set permission to "Allow" / Full controll (Or at least read permission)
• Click Apply.

On the sharing tab, the only entry you Need is:

• Everyone
• With permission "Full Controll".

You can manage the permissions with the NTFS-Permissions of the Security Tab.

The rest of the configuration looks correct.