1. Modify the registry key:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook\AppInit_DLLs\Unicode Injection IME Hook
Flag =0
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook\AppInit_DLLs\Unicode Injection IME Hook
Flag=0
2. Reboot the VDA
This DLL is used to return the correct keyboard type, it simply hooks the Windows API of GetKeyboardType.
Sometimes there is the compatibility issue with 3rd party IME(Non-Windows native input method).