Black screen after quickly swiping up and down on the Windows 8.1 lock screen

S’applique à : Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials

This article describes a black screen issue if the Camera app can be started by swiping down on the lock screen in Windows 8.1. The update has prerequisites.

Symptoms


Assume that your settings allow the Camera app to start by swiping down on the lock screen in Windows 8.1, so that swiping up and down may cause the Camera app and the touch keyboard to appear at the same time. In this situation, when you push the power button two times, the system resumes to an unresponsive black screen together with only the Camera app icon visible in the lower-left.

Resolution


To resolve this issue, we have released an update for Window 8.1. Even though this issue has only been observed in Windows 8.1, the update also applies to Windows Server 2012 R2 and Windows RT 8.1.

How to obtain this update

Method 1: Windows Update

This update is available from Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x86-based versions of Windows 8.1Download Download the package now.
All supported x64-based versions of Windows 8.1 Download Download the package now.
All supported x64-based versions of Windows Server 2012 R2Download Download the package now.
Note The update for Windows RT 8.1 can be obtained only from Windows Update.

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
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.


Update detail information


Prerequisites

To install this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

Workaround


To work around this issue, push and hold the power button to shut down the device, and then push it again to start the device.

References


See the terminology that Microsoft uses to describe software updates.