I have a Shared Folders in Windows 2008 R2
I can’t view them on the client PCs
“Security or firewall settings might be blocking the connection”
The remote computer isn’t responding to connections on port 445, possibly due to firewall or security policy settings, or because it might be temporarily unavailable. Windows couldn’t find any problems with the firewall on your computer.
There could be a setting or a permission that needs to be configured to make your shared file visible from your computer. Since you're using a Windows Server 2008 R2, we strongly suggest that you post this concern into TechNet forum for advanced troubleshooting steps to resolve this issue. This forum is specialized and dedicated for issues like what you're encountering.
The forum is comprised of IT specialists and IT professionals that can provide you further troubleshooting and more information about your concern.