- Touch the CMD and DAT inhibit bits during the tuning procedure causes the tuning to fail.
- The Preset Value Enable bit does not work with some Wi-Fi modules.
How to obtain this update or hotfixTo resolve this issue, we have released an update through Windows Update and Microsoft Download Center. We also have released a hotfix for Windows 8.1. The update or hotfix prevents the Sdbus.sys file from using the Preset Value Enable bit or touching the CMD and DAT inhibit bits during the tuning in the CHT platform.
Important Do not install a language pack after you install this update or hotfix. If you do, the language-specific changes in the update or hotfix will not be applied, and you will have to reinstall the update or hotfix. For more information, see Add language packs to Windows.
Method 1: Windows UpdateThis update is available from Windows Update.
Method 2: Microsoft Download CenterThe following files are available for download from the Microsoft Download Center:
|All supported x86-based versions of Windows 8.1||Download the package now.|
|All supported x64-based versions of Windows 8.1||Download the package now.|
Method 3: Hotfix package for Windows 8.1A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Update or hotfix detail information
PrerequisitesTo apply this update or hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1.
Registry informationTo apply this update or hotfix, you do not have to make any changes to the registry.
Restart requirementYou may have to restart the computer after you apply this update or hotfix.
Update or hotfix replacement informationThis update or hotfix does not replace a previously released update or hotfix.
Third-party information disclaimer