This update resolves the "Malformed Environment Variable" security vulnerability in Windows 2000, and is discussed in Microsoft Security Bulletin MS00-027. Install this update to help prevent a malicious user from consuming available memory on an affected server, which can slow down or stop the server's ability to respond. The vulnerability does not allow a malicious user to compromise data on the computer or take over administrative control.

For more information about this vulnerability, read Microsoft Security Bulletin MS00-027. (This site may be in English.)

1. Click Start, point to Settings and click Control Panel.
2. Double-click Add or Remove Programs.
3. Select Windows 2000 Hotfix (Pre-Sp1) [See Q259622 for more information] and click Change/Remove to uninstall.