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RemoteApp windows disappear and screen flickers when you switch between windows in Windows 8.1 or Windows Server 2012 R2
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Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 EssentialsWindows Server 2012 R2 FoundationWindows 8.1 EnterpriseWindows 8.1 ProWindows 8.1Windows RT 8.1More
This article describes an issue in which RemoteApp windows disappear and the screen flickers when you switch between open windows in Windows 8.1 or Windows Server 2012 R2. A hotfix is available to fix this issue. Before you install this hotfix, see the Prerequisites section.
This issue occurs when an application uses WM_SETREDRAW messages to suspend active paints and is hosted as a RemoteApp.
This issue occurs because win32k.sys sets the WS_VISIBLE flag to False when the application sends the WM_SETREDRAW messages to disable paints or vice versa. However, when these applications are hosted as RemoteApps, they get hidden instead of being transparent windows.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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 don't see your language, it's because a hotfix isn't available for that language.
Before you apply this hotfix, install update 2919355 in Windows 8.1 or Windows Server 2012 R2.
To use the hotfix in this package, you don't have to make any changes to the registry.
You may have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix doesn't replace a previously released hotfix.
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.
The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
6.3.960 0.16 xxx
Windows RT 8.1
6.3.960 0.17 xxx
Windows 8.1 and Windows Server 2012 R2
6.3.960 0.18 xxx
Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.