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Security Update, January 18, 2001

This update resolves the "Relative Shell Path" security vulnerability in Windows NT® 4.0. Under certain conditions, this vulnerability allows a malicious user, who has physical access to a computer, to alter the code in the executable file Explore.exe. This file provides the Windows Shell functionality of the desktop, and a change in the code could alter the desktop functionality. If this occurs, the code substitution runs automatically for any subsequent user. Download now to prevent a malicious user from altering the functionality of your desktop.

This vulnerability exists because Explore.exe is specified by a relative path, rather than an absolute path, in the registry key that Windows consults during startup. If it is placed in a certain location, the substitute version of the executable file is loaded when the computer starts.

For more information about this vulnerability, please read Microsoft Security Bulletin MS00-052. (This site is in English.)

System Requirements
This update applies to Windows NT 4.0

How to use
Restart your computer to complete the installation.

How to uninstall

1. Click Start, point to Settings, and then click Control Panel.
2. Double-click Add/Remove Programs.
3. Select Windows NT 4.0 Hotfix (Pre-SP2) [See Q269049 for more information], and click Add/Remove to uninstall.

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