Microsoft Knowledge Base Article 922979 contains the following INTRODUCTION:
After the initial release of Update Rollup 1 for Windows 2000 Service Pack 4 (SP4) on June 28, 2005,
we identified several issues that may occur when you install this update rollup. Version 2 of Update Rollup 1 for Windows 2000 SP4 was released on September 13,
2005 to address these issues.
This article describes a method that you can use to determine the version of Update Rollup 1 for Windows 2000 SP4 (KB891861) that is installed on your computer.
For more information about Update Rollup 1 for Windows 2000 SP4 (KB891861), click the following article number to view the article in the Microsoft Knowledge Base:
Update Rollup 1 for Windows 2000 SP4 and known issues