Proceed to the next method if the problem still occurs. Try each of the Methods below in order, testing the keys after each method. If you do not have the supported program you can still use the key by reassigning the key. Many of the default assignments require that you have a specific program installed, or that you are using a supported e-mail program, Internet browser or media player. This can also be due to having unexpected default or re-defined program assignments for the keys. This issue occurs because the scan codes issued by the keyboard are interpreted differently by each keyboard control utility. Third-party keyboard control utilities are also provided with Acer, Gateway 2000, and Sony Multimedia computers. Hewlett-Packard Multimedia Keyboard Utility
Examples of third-party keyboard control utilities are as follows: This issue can also occur if a third-party keyboard control utility is running on your computer.
This issue may occur if there is a problem with the USB connection on your computer.