no audio device after uninstalling antivirus?

[Rudyard]

I uninstalled a trial version of NOD32 antivirus as the only change to my system today and at first I noticed the internal beep PC speaker making noises but didnt think much of it until I tried to play an mp3 and WMP said it cant play it becasue there is a problem with my audio device.

I then tried it in VLC media player and it is just silent.

Then I noticed nothing at all would work with sound! So i ventured into control panel and under sound/audio devices it says there is none installed.......how do I reinstall my audio device which is built into my motherboard???

I then checked device manager and I have found something in that may be the problem.....I dont know what the microsoft kernal system audio is but it apparently has a problem.

My AC97 though it says is working fine which I dont understand.

so here is some screenshots that may assist in the problem solving:







anyone know whats going on?
Thanks in advance for any help.

P4 2.6ghz
Realtek AC97 onboard soundcard
gforce 5200 graphics card
1gig ram
80gb hdd

[Krispy Kritter]

All you should need to do is reinstall your MB drivers. You will need to determine the MB model and/or chipset. Then just download and install the latest version. The MB typically has a name and/or model number marked on the PCB or with a sticker.

[SLK001]

Make sure that the WINDOWS AUDIO service has been started.

CONTROL PANEL > ADMINISTRATIVE TOOLS > SERVICES

Probably on exit, the AV program stopped (or disabled) this service.

[Dv8ted2]

You could even go into the device manager and remove it, then select scan for hardware changes. This will redetect the audio and prompt for the driver.

[Rudyard]

I will try Dv8teds way first and see how I go, then I will search for new drivers as Krispy Kritter suggested.

SLK001, I had a look but it was still enabled.

Can anyone tell me if Microsfot Kernel is likely to be the problem? I dont know what it is but thought my onboard sound was the AC97 realtek thing which it says is fine?

Thank again for all your help.