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How to Clear Environment Variables Using Setx.exe

Article ID: 195050

Article Last Modified on 10/31/2006

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This article was previously published under Q195050

SUMMARY

This article describes how to use the Setx.exe tool to clear both user and system environment variables. Setx.exe is included with the Windows NT 4.0 Resource Kit.

MORE INFORMATION

To clear an environment variable using Setx.exe at a command prompt:

  1. Click Start, point to Programs, and then click Command Prompt.
  2. If you want to clear a user environment variable, type the following line

    setx <variable> ""

    where <variable> is the user environment variable.
  3. If you want to clear a system environment variable, type the following line

    setx <variable> "" -m

    where <variable> is the system environment variable.
  4. Close the command prompt.
When you use Setx.exe to clear an environment variable value, the environment variable name is not affected.

Additional query words: set null

Keywords: kbenv kbhowto KB195050


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