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Updated – dec 2017

On Windows 10 your Citrix Receiver may show blurry text.  This problem occurs due dynamic display scaling on non DPI aware (older) programs (more about that here). In Windows 10, the DPI scaling is turned on default. So to fix the problem, we need to turn it off for Citrix Receiver.

The affected files for Citrix Receiver are the CDviewer.exe and wfica32.exe. 

Fixing Citrix Receiver blurry text on Windows 10

To change this behavior for Citrix Receiver we need to open the properties of the executables,  the CDviewer.exe (found in C:\Program Files (x86)\Citrix\ICA Client)

  1. Open the Explorer and navigate to C:\Program Files (x86)\Citrix\ICA Client
  2. Right click the CDViewer.exe and choose Properties
  3. Goto the Compatibility tab and disable or override (depending on your Windows 10 build) the DPI scaling
  4. Perform the same steps for the wfica32.exe in the same folder

Update: In the recent Win 10 build the Compatibility tab is changed a little.  Under settings check “Override high DPI scaling behavior” and select Scaling performed by: System.
Thanks to Mike de Pouw