I am running SuperMicro PDSGE with Realtek AC97 audio. After install of Windows 10 (Version 10.0.10240) yesterday, my computer blue screens withRTKVAC64.SYS as the problem. Uninstalled audio device through safe mode, no Realtek drivers available from Realtek's website work. Audio worked just fine in Win7 prior to installation of Windows 10 Release yesterday 7/30/2015 (Version 10.0.10240). Device Manager does not find any compatible driver available and does not allow manual installation of driver.
Realtek's free High Definition Audio Codec pack enables stereo digital audio at resolutions up to 24-bit/192kHz, as well as 5.1-channel Dolby Digital audio. Though it's essentially a package of drivers, it installs like a Windows program and may require a reboot. Realtek HD Audio Codec is available in separate downloads for 32-bit or 64-bit Windows Vista, 7, and 8 systems with Realtek controllers.
Pros
Realtek HD Audio Driver is the most commonly used sound drivers for managing the sound settings for Windows system. Realtek High Definition Audio Manager comes packed along with Realtek Audio. Driver Talent provides utterly completely different versions of official Realtek audio drivers. Currently, choose the Realtek driver compatible in conjunction with your Windows 10 (64-bit or 32-bit) via the button below. Method 1: Update the Realtek audio driver manually via Device Manager 1) On your keyboard, press the Win+R (Windows logo key and R key) at the same time to invoke the Run box. 2) Type devmgmt.msc and press Enter to open the Device Manager window. Realtek HD Audio Manager will be installed along with Realtek Audio driver. If you are comfortable with advanced settings use it to change audio settings to get better sound experience. If it is missing, the Realtek audio driver may be corrupted, get it back by reinstalling the Realtek audio driver. Realtek HD Audio Codec is available in separate downloads for 32-bit or 64-bit Windows Vista, 7, and 8 systems with Realtek controllers. Pros Audiophile-quality digital audio: No matter the source.
Audiophile-quality digital audio: No matter the source, you'll get super-high-quality digital audio. We streamed audio at up to 320kbs from Spotify and other sources. Even MP3s sounded better.
Dolby HT4: Dolby Home Theater 4 settings include Movie, Music, and Game modes with up to six presets, or you can turn Dolby off in the Properties dialog.
Multiple output options: We could select and configure Realtek Digital Output options for all our digital connections and output jacks, including optical, USB, and internal ATAPI.
Cons
Realtek HD controllers only: Not all motherboards use Realtek audio chips, and not all Realtek controllers are HD-compatible. Fortunately, the codecs won't install on the wrong system.
Watch the installation: There are other programs added automatically during the standard installation. Choosing the Custom installation option let us decline 'extras' we didn't want.
System compatibility: While Realtek HD Audio Codec works with Realtek controllers, some motherboard implementations may not be fully compatible and require proprietary audio drivers instead.
Microsoft Realtek Audio Driver Downloads
Bottom line
If your PC has a Realtek HD audio controller, Realtek High Definition Audio Codec will help you get the most out of it. Chances are, your Realtek controller may already have this codec, courtesy of Windows Update. If it doesn't have it, get it!