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Users cannot launch Network Connect, receiving nc.windows.app.23704 or nc.windows.app.23712 errors.

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Knowledge Base ID: KB14270
Last Updated: 12 Aug 2011
Version: 3.0

Summary:

Users cannot launch Network Connect; instead they receive nc.windows.app.23704 or nc.windows.app.23712 errors.

Problem or Goal:
This issue can occur when Network Connect cannot configure the Adapter.

Solution:
There are three common possible causes for these errors:
  1. Media Sense is disabled
    The easiest way to check if Media Sense has been disabled is to open up a command prompt and run "ipconfig /all" when Network Connect is not connected. If you see the Media State parameter then Media Sense should still be enabled.

    Ethernet adapter Network Connect Adapter:

    Media State . . . . . . . . . . . : Media disconnected
    Description . . . . . . . . . . . : Juniper Network Connect Virtual Adapter - Juniper Network Agent Miniport
    Physical Address. . . . . . . . . : 00-FF-08-50-06-89

    If Media Sense has been disabled then Network Connect will have an IP address in the 169 range or an IP from your last successful connection.

    Ethernet adapter Network Connect Adapter:

    Connection-specific DNS Suffix:
    Description . . . . . . . . . . . : Juniper Network Connect Virtual Adapter - Juniper Network Agent Miniport
    Physical Address. . . . . . . . . : 00-FF-08-50-06-89
    Dhcp Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IP Address. . . . . . . . . . . . : 169.X.X.X.
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : X.X.X.X
    DHCP Server . . . . . . . . . . . : 10.200.200.200

    You can re-enable it by going to \HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters and change DisableDHCPMediaSense (dword) key from 1 to 0. By default Media Sense is enabled on all XP machines and so if you do not find DisableDHCPMediaSense, then you can usually assume that Media Sense is turned on.
  2. DHCP Client Service is disabled
    You can re-enable it by going to Control Panel > Administrative Tools > Services
  3. A client firewall/antivirus is blocking Network Connect

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