When you try to login to your Citrix ICA Client you might receive the following error:
Citrix ICA Client Engine (Win32) has encountered a problem and needs to close. We are sorry for the inconvenience as you can see in the picture below:
This problem usually happens when you install additional printer or change drivers for existing printer which are not compatible with Citrix. This error happens in the stage when ICA applies logon scripts.
Try to login as Administrator and remove all printers and print drivers from Print Manager. If the problem is gone, try adding the printer one by one to narrow down the problematic driver.