My computer has recently started making a sort of grinding sound about every 5 seconds. When it first started I didn't realize it was coming from my computer. I thought somebody was using some type of machine outside. The noise does stop for awhile at times but then starts up again. I can't really describe it any better than this.

Of course, just in time for my upcoming unofficial retirement.

Since the noise goes away for periods of time, I'd guess it's a case fan that only turns on when the case gets too hot.

Oh, I was afraid it might be my hard drive. Is there anything to do with a case fan other than replace it? I really do need a good internal cleaning. Trying to wait until May when I'll have more time.

Thanks Jenny!

Yes it sounds like a fan. You cannot fix the fan you can only replace it. They are fairly cheap and if it is a case fan it is easy to replace,4 screws and unplug it. Note that there are usually 2 sizes used in computers a 80mm and a 120mm. Also note there is usually a fan on the video card and one in the power supply. I find the noisy one by stopping the fans with my finger. This might sound dangerous but the blades are plastic and the fan motor is very weak.

Thanks for the info Geo!