NAC agent don't popup on some computer

[nicanor00]

Hi

I use

ISE version : 1.1.1.2 and NAC agent version : 4.9.0.42

NAC agent  does not run on some computers and run on other(windows 7).

What can be these problems?

Please help

Regards

[Naveen Kumar]

Please check those decisions on NAC agent, it may definitely help you:

https://supportforums.cisco.com/thread/2156494

https://supportforums.cisco.com/thread/2085819

[Venkatesh Attuluri]

Please look in to this , it might help you

Agent Login Dialog Not Appearing

Symptoms or Issue	The agent login dialog box does not appear to the user following client provisioning.
Conditions	This issue can generally take place during the posture assessment phase of any user authentication session.
Possible Causes	There are multiple possible causes for this type of issue. See the following Resolution descriptions for details.
Resolution	•Ensure that the agent is running on the client machine. •Ensure that the Cisco IOS release on the switch is equal to or more recent than Cisco IOS Release 12.2.(53)SE. •Ensure  that the discovery host address on the Cisco NAC agent or Mac OS X  agent is pointing to the Cisco ISE FQDN. (Right-click the NAC agent icon, choose Properties, and check the discovery host.) •Ensure  that the access switch allows Swiss communication between Cisco ISE and  the end client machine. Limited access ACL applied for the session  should allow Swiss ports: remark Allow DHCP permit udp any eq bootpc any eq bootps remark Allow DNS permit udp any any eq domain remark ping permit icmp any any permit tcp any host 80.0.80.2 eq 443 --> This is for URL redirect permit tcp any host 80.0.80.2 eq www --> Provides access to internet permit tcp any host 80.0.80.2 eq 8443 --> This is for guest portal port permit tcp any host 80.0.80.2 eq 8905 --> This is for posture communication between NAC agent and ISE (Swiss ports) permit udp any host 80.0.80.2 eq 8905 --> This is for posture communication between NAC agent and ISE (Swiss ports) deny ip any any •If  the agent login dialog still does not appear, it could be a certificate  issue. Ensure that the certificate that is used for Swiss communication  on the end client is in the Cisco ISE certificate trusted list. •Ensure that the default gateway is reachable from the client machine.