OK. Some of this could get ticklish, so we're gonna create a restore point. Click on the "Start" button. Then "All Programs" then "PC Help & Tools"
Click on "System Restore". You should get a box that offers two options. You want the one that says "Create a Restore Point" Select that and hit OK or Next or whatever. It should ask you to name the restore point. I'd type in something like "Sound Card". Doesn't matter, just something that will stick out and you'll remember. Most other entries will just be named for the date they were created, so it doesn't really matter.
Hit "Next" Or "OK" or whatever, then it tells you that the restore point has been created. Click "Finish".
Now you have a restore point. No matter what we do from here, you can reset it all right back to where you are now.
Go back to "Device Manager", where you got that screen shot from.
It will be the Conexant High Definition Smartaudio 221
Right click on that. Hit "Update Driver" Choose to "let Windows search the web for a new driver, this time only", if it gives you an option.
Most likely it will finish up in a few minutes and tell you that it can't continue because you already have the best driver.
However, if it does find and install a new driver, check and see if that fixes the problem. Reboot, then see if you have sound.
If it tells you that you already have the best driver, try to download a driver and install it.
Found one:
http://download.cnet.com/Conexant-High-Definition-SmartAudio-221/3000-2110_4-177475.html
It may have an auto install feature where you can click on it and just follow the directions. If not, right click on the card, as before, but this time tell windows to use this driver. You'll want to have it in a folder by it's self, on your desktop, just to keep things simple. You'll tell windows that you have a driver, then browse for that location, when it asks. If windows says you already have a better driver, tell it to use this one anyway.
Download that, install it, reboot, check the sound.
If that doesn't work. Go back to where you got the screen shot and right click on that last entry "MusC Audio". Then remove it. That one's been known to cause problems, on occasion.
Reboot, check sound.
If that didn't work, go back to where you got the screen shot, right click on The conexant entry, hit "Uninstall". Reboot. The hardware detection mat tell you it's found new hardwarer, when windows comes back up, if so just follow the instructions to re-install the sound card. If it doesn't, go to "Control Panel" click on add hardware and follow the directions.
Finish with that and check the sound. If it still doesn't work, reboot and check again.
If none of this works, I'm out of ideas. ou could always use that restore program to roll you machine back to the last date before you did the upgrade that caused all this. But then you wouldn't be able to connect to the Uni system, that was the reason for the update.
At this point, you'll probably have to take it to the shop, unless Chuck or Dianna have further ideas. If this is a desktop machine and you can do it yourself, you might try installing a new (cheap) sound card yourself. Might be cheaper. <Shrug> If it's a laptop, that's not an option and it might not work anyway.
SOME PEOPLE ARE LIKE SLINKIES; NOT REALLY GOOD FOR ANYTHING BUT THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.