Whirring sound at startup only

[fmwar]

My HP dc7700 Mini tower with Windows 7 Professional starts in the morning with a whirring sound as if there in a disk spinning in the DVD drive.  After a short time, it quiets for the remainder of the day.  I have  opened the case and after blowing out all dust from fans and CPU cooling tower, the noise was reduced.  The case was very clean.

I do not think it is a HD problem.  If it is a fan problem, I cannot locate it.  All fans seem to be performing well.

Invoice date 01/08/2003

Do you have any suggestions?

[old_geekster]

Fmwar, welcome to the forum.

I wish that I could tell you what is causing this sound, because I have heard the same sound in my custom-built gaming computer for over two years.  I, too, in the beginning believed that it was the hard drive.  I have listened at boot with the side panel off and still can't pinpoint the culprit.  It only lasts for 3 to 10 seconds at most, ending with an upward sound.  It has not caused me any problems, however.  Maybe one of the other members will be able to help both of us.

[fmwar]

I would think I would hear some clicking sound if it was the HD.  that is why I suspected a fan.  Time will tell.