[From SQLServer Magazine
Microsoft announced hotfixes for two known bugs. The article "FIX: Cannot Remove Microsoft SQL Server 2000 Desktop Engine After You Upgrade to MSDE 2000 SP2" (available at http://support.microsoft.com/default.aspx?scid=kb;en-us;317619 ) explains that all editions of SQL Server 2000 (Personal, Evaluation, Developer, Standard, and Enterprise) include the 8.00.194.01 build of Microsoft SQL Server Desktop Engine 2000 (MSDE 2000) on the products' CD-ROMs. If you originally used this build of MSDE and you upgrade to MSDE 2000 Service Pack 2 (SP2), you can't remove MSDE 2000 from the computer.
The article continues at