I have a Dell running Win xp high spd intr.. decided to run my Cccleaner... and apparently dumped my mixer.(?).there is no hardware showing for audio.. I have the most recent flash player loaded.. how do I fix this.. how did I do this? Reply asap

There is no hardware showing for audio? I'm assuming you checked under control panel audio, correct?

In which case, you probably deleted the driver for your computer.
What model Dell are you using? You could redownload the driver, but you would need a model-name or model-number to avoid any further complications.

Visit this page, find your model, then find the sound driver and redownload that.
http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen

Please post if that works, or if not so we could try other alternatives. :)

As mentioned above, see if reintstalling the driver will fix this

Also you mentioned,
there is no hardware showing for audio.

Where did you go to see this? Device mgr?