I will link you a short video of my iPhone aimed at my hard drive and the noise it makes when only firefox or nothing is open. This was just recorded 10 minutes ago btw. 8 minutes after Startup.
http://www.youtube.com/watch?v=ZnkpgBFKzNM&feature=youtu.be
***AGAIN, WATCH THE LINK.AT LEAST 40 seconds.
So, you watched it, what is it? Sometimes the sound stops but it always come back. We gotten a new fan 2 months ago. 4 months ago I had gotten a new hard drive with a fan. AND a CPU.
So what do?
>>> What noise is my computer making? Hard drive or fan?