Hi,
Try this - Open an Elevated Command Prompt :
Start - type in the Search box -> CMD.exe find at top - Right Click on - RUN AS
ADMIN - type in or COPY and PASTE - press ENTER after each line.
net localgroup Administrators /add networkservice
(Press ENTER)
net localgroup Administrators /add localservice
(Press ENTER)
Close Window and Restart the computer.
More troubleshooting if needed :
References to Vista also apply to Windows 7.
Fixing a customer problem: “No Audio Device is Installed” when launching sndvol on
Windows Vista <- read this link
http://blogs.msdn.com/b/larryosterman/archive/2009/01/06/fixing-a-customer-problem-no-audio-device-is-installed-when-launching-sndvol-on-windows-vista.aspx
Also update or re-install the driver.

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The installation archive contains drivers for both Windows Vista/Windows 7 32 bit and 64 bit. Prior installing the Realtek Vista/Win 7 Audio driver, we recommend uninstalling all previous Realtek AC'97 drivers. Please note that this drivers is for Windows Vista and Windows 7 only, for Windws XP drivers please visit our Drivers section. Realtek. Audio Driver for Windows 7. for Desktop Boards. Sort Date Most helpful Positive rating Negative rating. I can’t use this driver as a default device. It isn’t included in any XP service packs or other downloads. Sort Date Most helpful Positive rating Negative rating. Download Realtek. Audio Driver for Windows 7. for Desktop Boards.

Control Panel - Device Manager - SOUNDS - look for HD Audio - Mine says RealTek High
Definition Audio (that is an example and yours may have an entirely different name/maker).
Write down description make and model - double click on it - drivers tab - write down version.
Now Click UPdate Drivers which may not do anything as MS is far behind certifying drivers.
Then RIGHT CLICK on it and UNINSTALL - REBOOT - this will rebuild the driver stack.
1st go to system maker's site and look for latest driver Download - SAVE - go to right click on
and RUN AS ADMIN (This is your fallback.) REBOOT after each driver installation.
NOTE : Sound drivers often rollback so check the version after installation and the
reboot to see if the version you installed is there, if not repeat the install - reboot
until it is. It can take several tries depending on how many rollbacks it does.
Then do same for Device Maker's site.

Manually look at manufacturer's sites for drivers - and Device Maker's sites.
http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm

Installing and updating drivers in Windows 7 (updating drivers manually using the methods above
is preferred to ensure the latest drivers from System maker and Device makers are found)
http://www.sevenforums.com/tutorials/43216-installing-updating-drivers-7-a.html
-----------------------------------------------------
Error “the Audio Service Is Not Running” When Opening the Volume Mixer in Vista
http://www.winhelponline.com/blog/error-the-audio-service-is-not-running-when-opening-the-volume-mixer-in-vista/
Also Right Click Speaker near clock - Playback Devices - right click in the box area -
check Show disable and disconnected devices. Highlight Speakers and on the lower
Right click Properties check settings for Device Usage enabled and so on. Also do
same for Configure on Lower Left of that box.

In Control Panel you can also look for an Audio Manager along with the Sound Settings.

Open the Playing Audio troubleshooter
http://windows.microsoft.com/en-us/windows7/Open-the-Playing-Audio-troubleshooter
Problems with sound and audio or no sound - a Mr Fixit
http://support.microsoft.com/gp/no_sound
No sound in Windows
http://windows.microsoft.com/en-us/windows/help/no-sound-in-windows
Tips for fixing common sound problems
http://windows.microsoft.com/en-us/windows7/Tips-for-fixing-common-sound-problems
Speakers and other audio output devices
http://windowshelp.microsoft.com/Windows/en-US/Help/a43f3a31-6d9f-49d1-be22-e2f47b8b1f2c1033.mspx
How to Enable Hidden Audio Devices in Vista
http://www.vistax64.com/tutorials/143447-audio-device-enable-hidden-devices.html
How to troubleshoot sound problems that you experience after you install a Windows Vista
Service Pack
http://support.microsoft.com/kb/948481
Hope this helps.

Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle <- Mark Twain said it right!

Ac79 Audio Driver Windows 7 32 Bit Download

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