How To Fix Applications Failing To Launch With Citrix Receiver 3.0

Do you have a workstation that intermittently boots up with both the black Citrix Receiver icon and the old blue Program Neighborhood Agent/Online Plugin icon? And does it fail to launch published applications?

This is a very common problem that affects both Windows XP and Windows 7 machines. Sometimes when the workstation boots, only the Citrix Receiver icon shows up and apps launch fine. But occasionally it will boot with both the Receiver icon and the blue PNAgent icon, and apps will just not launch.

A typical workaround for this has involved terminating the pnamain.exe process, thus killing the blue PNAgent icon, and allowing apps to launch successfully. But this manual workaround gets old after a while.

Your results may vary, but I have found that deleting the registry keys HKEY_CURRENT_USER\Software\Citrix\ICA Client\Engine\Configuration and HKLM\Software\Citrix\ICA Client\Engine\Configuration (on 64-bit systems: HKLM\Software\Wow6432Node\Citrix\ICA Client\Engine\Configuration) will allow applications to launch consistently, and will cause both the Receiver and PNAgent icons to appear consistently and behave normally.

If you have any workstations with this issue, try deleting the above keys and let me know what kind of results you get.

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