August 12, 2014 update for PowerPoint 2013 (KB2883051)

Applies to: PowerPoint 2013Office Home and Student 2013 RT

This article describes update KB2883051 for Microsoft PowerPoint 2013 that was released on August 12, 2014. This update also applies to Office Home and Student 2013 RT, which contains PowerPoint 2013. Please note that this update does not apply to Office 365 editions such as Office 365 Home.


Improvements in this Update

This update improves the Record Audio and the Record Slide Show features in PowerPoint 2013. It changes the default audio format from WMA to M4A, which is a format that is supported by PowerPoint Online and also by ARM devices such as Microsoft Windows Phone, Google Android, and Apple iPhone. In addition, this update provides a registry key that can be used to change the default audio format back to WMA:
Registry key: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\PowerPoint\Options\MediaTargetFormat
Value: String
MP4 (default): Use .mp4 for video and use .m4a for audio
WMV: Use .wmv for video and use .wma for audio

After you install this update, if you want to change the default audio format back to WMA, follow these steps:
  1. Exit all Microsoft Office applications.
  2. Start Registry Editor:
    • In Windows 7, click Start and type regedit in the Search programs and files text box, and then click regedit.exe in the search results.
    • In Windows 8, move your mouse to the upper-right corner, click Search and type regedit in the search text box, and then click regedit.exe in the search results.
  3. Locate and then select the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\PowerPoint\Options\
  4. On the Edit menu, point to New, and then click DWORD Value.
  5. Type MediaTargetFormat, and then press Enter.
  6. In the Details pane, right-click MediaTargetFormat, and then click Modify.
  7. In the Value data box, type WMV, and then click OK.
  8. Exit Registry Editor.

How to download and install the update


Windows Update

Use Windows Update to automatically download and install the update.

Download Center

This update is also available for manual download and install from the Microsoft Download Center. The updates in the Download Center cannot be installed on Office Home and Student 2013 RT.
If you are not sure what platform (32-bit or 64-bit) you’re running, see Am I running 32-bit or 64-bit Office.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services

Restart information

You do not have to restart the computer after you install this update.

More Information


This update applies to the Microsoft Installer (.msi)-based edition of PowerPoint 2013. It does not apply to the PowerPoint 2013 Click-to-Run editions such as Microsoft Office 365 Home.

How to determine if my Office installation is Click-to-Run or MSI-based:
  1. Start PowerPoint 2013.
  2. On the File menu, click Account.
  3. For Office 2013 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item is not displayed.
Office 2013 Click-to-Run installationMSI-based Office 2013
The screenshot for PowerPoint click to run The screenshot for PowerPoint MSI

The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all Versions of Office. For more information about the Office System TechCenter, go to the following Microsoft website: