MpG 0 Junior Poster in Training

Well this is a bit strange.I own my PC since 2002 and it operated correctly.The last months though I noticed a strange effect.When I use my CD/DVD drives a sound is heard through my speakers.The sound is caused by the optical reading of the cd/dvd and correspond to the RPM of the drive. Even my hard drive is heard loading something if I turn the volume on.What I know is that these sounds are normal(but not annoying since they should be weak!),the thing I don't know is why to be that obvius and what caused it.

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