Unable to access PC inside a domain with RCD

What are your domain policy settings regarding W7 workstation Firewalls?

probably windows firewall which is enable is doing this. If it is grayed out probably it is enabled based on GPO? Do you have such a GPO in your domain which could affect this PC?
You can check which GPO is applied on the machine by gpresult command

Also you can check in System settings if Remote connection is enabled for that PC

Helpfinder:
Thanks for your response:
1) yes, Remote Connection is enabled on the client's side ("Allow Connections from Computers Running Any version of Windows") Also, these choices are grayed out, so I couldn't change them if I wanted to.
2)How do I go about editing the GPO in server 2011 SBS?

you need to open Group Policy Management (in Administrative Tools) and check GPOs and in case of need edit it.
also as I wrote you can use on Win 7 machine gpresult /r command to check which GPOs are applied and based on this you can then check and edit GPO in your server

Helpfinder: The users are now in production mode, so I'll have to wait until lunch time to be able to run the gpresult /r command.
I'll let you know.

Weird thing is that I am able to access all other PCs, but this one. I already disjoined the domain and re-joined to same results....
Thank you.

Sinfocomar:

here is the policy for domain firewall:
Setting      State      Comment
Windows Firewall: Allow local program exceptions      Not configured      No
Windows Firewall: Define inbound program exceptions      Not configured      No
Windows Firewall: Protect all network connections      Disabled      No
Windows Firewall: Do not allow exceptions      Not configured      No
Windows Firewall: Allow inbound file and printer sharing exception      Not configured      No
Windows Firewall: Allow ICMP exceptions      Not configured      No
Windows Firewall: Allow logging      Not configured      No
Windows Firewall: Prohibit notifications      Not configured      No
Windows Firewall: Allow local port exceptions      Not configured      No
Windows Firewall: Define inbound port exceptions      Not configured      No
Windows Firewall: Allow inbound remote administration exception       Enabled      No
Windows Firewall: Allow inbound Remote Desktop exceptions      Enabled      No
Windows Firewall: Prohibit unicast response to multicast or broadcast requests      Not configured      No
Windows Firewall: Allow inbound UPnP framework exceptions      Not configured      No

maybe GPO is linked only to this PC? Are all the PCs in the same OU in AD?
you can also try gpupdate /force command, in case GPO is not refreshed correctly (if valid GPO is to disable win firewall)

Yes, all PCs are on the same OU in AD.
Should the gpupdate /force command be ran from the DC or the PC having the issue?

from PC - it will update PC with all GPOs which should be there

I just tried that: updated policies, but upon trying to connect, same thing....

OK, what about gpresult /r?

helpfinder: it is interesting to note that now the firewall on that PC is now disabled on the Domain portion (still grayed out) and only enabled to Public networks.
I temporarily disabled the firewall for public networked, tested RCD again to no avail...

Here you go:

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\asiblesz>gpresult /r

Microsoft (R) Windows (R) Operating System Group Policy Result tool v2.0
Copyright (C) Microsoft Corp. 1981-2001

Created On 7/16/2013 at 10:28:48 AM


RSOP data for SMARTINVEST\asiblesz on ASIBLESZ : Logging Mode
--------------------------------------------------------------

OS Configuration:            Member Workstation
OS Version:                  6.1.7601
Site Name:                   N/A
Roaming Profile:             N/A
Local Profile:               C:\Users\asiblesz
Connected over a slow link?: No


USER SETTINGS
--------------
    CN=Alberto Siblesz,CN=Users,DC=smartinvest,DC=local
    Last time Group Policy was applied: 7/16/2013 at 10:23:30 AM
    Group Policy was applied from:      SERVER01.smartinvest.local
    Group Policy slow link threshold:   500 kbps
    Domain Name:                        SMARTINVEST
    Domain Type:                        Windows 2000

    Applied Group Policy Objects
    -----------------------------
        Windows SBS CSE Policy

    The following GPOs were not applied because they were filtered out
    -------------------------------------------------------------------
        Default Domain Policy
            Filtering:  Not Applied (Empty)

        Update Services Common Settings Policy
            Filtering:  Not Applied (Empty)

        Local Group Policy
            Filtering:  Not Applied (Empty)

    The user is a part of the following security groups
    ---------------------------------------------------
        Domain Users
        Everyone
        BUILTIN\Administrators
        BUILTIN\Users
        NT AUTHORITY\INTERACTIVE
        CONSOLE LOGON
        NT AUTHORITY\Authenticated Users
        This Organization
        LOCAL
        High Mandatory Level

Please change Windows Firewall: Allow inbound Remote Desktop exceptions      Enabled      No

change to Yes

Helpfinder:
Yes I can ping by IP and by name.

hmm, and RDP using IP is also not working?

If you've enabled RDP exceptions at GP level... have you also checked if users are enabled for RDP in their profile

Helpfinder: IP using RDP, same results

did you also try to change firevall settings as sinfocomar wrote?
are you able to stop windows firewall service in Services and try?

All responses were accurate, but unfortunately none of them solved the issue.
I've found the solution looking at a blog on the web.