I have had a Compaq Presario CQ62 for about a month and a half. When I turn it on now, I get a message saying, "A system fan is not working properly", and that it is not recommended to keep the system running. I used to be able to hear the fan frequently, but now I don't. The computer itself has not been dropped or damaged in any way at all.

Is this a common problem? Why is the fan not working, and is there a way I can fix it?