I have a problem similar to the ones reported for many Vista users where my sound stopped working. I have tried all the same solutions including a system restore back to an earlier point, fixing the reg keys recommended in several reports, (although none were actually incorrect), tried disabling all enhancements on both devices. I also tried getting the original drivers from DELL. I know for certain it is not a hardware problem because I have a dual boot set up on my computer both running Windows 7. The one works fine, no problems. The other doesn't work. The one difference is that the one that is still working was a clean install whereas the one that is not working was an upgrade from Vista, although it worked fine for quite a while. I'm not sure what to do now because I've tried all suggestions that I could find in the Vista forum.

I have a problem similar to the ones reported for many Vista users where my sound stopped working. I have tried all the same solutions including a system restore back to an earlier point, fixing the reg keys recommended in several reports, (although none were actually incorrect), tried disabling all enhancements on both devices. I also tried getting the original drivers from DELL. I know for certain it is not a hardware problem because I have a dual boot set up on my computer both running Windows 7. The one works fine, no problems. The other doesn't work. The one difference is that the one that is still working was a clean install whereas the one that is not working was an upgrade from Vista, although it worked fine for quite a while. I'm not sure what to do now because I've tried all suggestions that I could find in the Vista forum. I'm having the same problem. I've also tried reinstalling codecs and drivers but not luck.

Try the following suggestions and see if the issue can be resolved: Run the Troubleshooting Tool ======= 1. Go to Start, type troubleshoot in the Start Search box and then press ENTER. 2. Click Troubleshoot audio playback. 3. Follow the wizard to see if the sound issue can be resolved. Check the device's status using the following steps: ======= 1. Click "Start", input "Device Manager" (without quotation marks) in the Search box, and then press "Enter". 2. Double-click "Sound, video and game controllers" to expand it. 3. Double-click the installed Sound Card to open its Properties. 4. On the General tab, please check the message in the Device Status section. 5. If the device is not working properly, please right click on the sound card and then click Uninstall. 6. Restart the computer and run Windows Update to install the sound card driver. Then, if the device is working properly, please follow these steps to check the sound settings: ======= 1. Click "Start", input "mmsys.cpl" (without quotation marks) in the Search box, and then press "Enter". 2. Click the "Playback" tab, choose the default sound playback device, and click "Apply". 3. Double click the output device, on "Levels" tab, check if the sound is mute and then click Apply. Hope this helps. Regards, Linda Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.