Command-line characters in a console-based app are difficult to read

Symptoms

Consider the following scenario:
  • You have a computer that's running a command line in a console-based application.
  • The application uses raster-based fonts.
  • The application updates a character.

In this scenario, a column of pixels is erased in the character to the right of the character updated, and this makes that character difficult to read.

Cause

This problem occurs because of a bug in the Conhost.exe process that causes pixel corruption.

Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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, go to 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.

Prerequisites

To apply this hotfix in Windows 7 or Windows Server 2008 R2, you must have Service Pack 1 installed.

To apply this hotfix in Windows 8.1 or Windows Server 2012 R2, you must first have update 2919355 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.
File information

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminology that Microsoft uses to describe software updates.
Properties

Article ID: 2980344 - Last Review: 12 Aug 2014 - Revision: 1

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