If, when you type in a remote desktop or application, none of the keystrokes seem to work, the issue might be with security software on your local client system.
While connected to a remote desktop or application, no characters appear when you type. Another symptom might be that a single key keeps repeating itself.
Some security software, such as Norton 360 Total Security, includes a feature that detects keylogger programs and blocks keystroke logging. This security feature is meant to protect the system against unwanted spyware that, for example, steals passwords and credit card numbers. Unfortunately, this security software might block Horizon Client from sending keystrokes to the remote desktop or application.