By chance do you have a RealTek sound card in your PC? If you
aren't sure, press and hold your Windows logo key followed by the
Pause/Break key. This should produce the System Properties dialog.
From there, click the Hardware tab and finally the Device Manager
button. This should produce the Device Manager dialog. Expand the
Sound, video and game controllers area. See if anything in that
area relates to RealTek.
If so, you may be interested in the Captivate Hotfix