Hi Folks!!
A common issue I see happen all the time which most people put up with but I do not is the Citrix XenDesktop 5.6 Desktop Studio being extremely slow to start up and also you receive an error saying “This snap-in is not responding”
Luckily the fix is nice and simple!! Go into your Internet Explorer settings and un-tick the checkbox which says “Check for publisher’s certificate revocation”. Now the next time you launch the XenDesktop Desktop Studio it should be nice and fast with no errors instead of really slow 
I want to fix this issue long time ago. i appreciate your experience share. May i know you how to find out the resolution? Many many appreciate.
Thanks alot, very helpful!