It seems that just installing the Visual C++ runtimes as stated in my previous post (http://wp.me/p1SoG3-12) didn’t do the trick for everyone. I have a couple of more solutions to try that have worked well for us in those cases the runtime doesn’t help:
1. Uninstall the Citrix Receiver plugin
2. Delete the following registry values (64-bit machines):
HKLM\SOFTWARE\Wow6432Node\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Control HKCU\SOFTWARE\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Control
3. Install version 18.104.22.168 of the Citrix Receiver plugin (you’ll have to Google that on your own, I have no reliable download links to add here).
If the above doesn’t help, there are some useful tips on the following page: http://support.citrix.com/article/CTX116550