Application doesn't look right

Well I had a problem with one of my hard drives not showing up the other day
and I was trying to re-install the drivers like it suggested and nothing. I
came across this application called keyhook in my system folder and its
labeled as an application but I dont know what it is. When I checked into the
properties, under the Legal Trademarks it lists only $, for the Original
Filename its called KEYHOOK.EXE. The Product name says its SIS (R) Compatible
Super VGA keyboard daemon. Im not sure if this is right but it doesnt look
right to me. Anyone with some advice on what to do, I tried to delete it but
cant because "the specified file is being used by Windows.