I have a Gateway system and was having no problem with the keyboard but decided to go to a cordless key board and mouse. On the Microsoft keyboard that I installed all of the hot keys work accept for the volume control. Microsoft tech suggested several things to try. One thing they told me to try that I could not make work is as follows. They told me to make sure that HID input services was running. It will not start when you try to start it. An error message says "Error 2 The system cannot find the file specified".They told me to extract it form the Windows installation disk and it shows that it was extracted and is in the drivers file but I continue to get the same error message. Microsoft tech and Gateway tech both say they cannot help me further. Can anyone help me please?