No audio device-No sound at all!

For a while now I have had no sound on my laptop. I have tried numerous things, downloading drivers etc but nothing seems to work. If I try to play music through windows media player I get a message saying: Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly.

My computer tells me that I have no audio device.

I also tried downloading an audio device and an error message came up saying: corrupt cabinet file.

Any ideas what I can do?

Same Audio Problem

I don't know if its related but I had a ?virus? or whatever where it puts a search tool bar and other junk on your browser. Finally I got rid of that. Now my computer plays no sound, and it says I have no audio or sound device. My windows media player gives an error message saying I dont have a sound device or its not working properly. Does anyone know how to fix this? If so it would be greatly appreciated. Thanks.

your soundcard could be corrupted two things i would suggest to do with a laptop either send it in if it is still under warranty or try and reinstall windows and see if that fixes the problem that would wipe out any viruses that would possibly be there