Microsoft has released KB910393 Update. This update is intended for systems running Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005. Install this update to prevent Windows Media Player 10 setup from overwriting digital rights management (DRM) files installed by Update Rollup 2 for Windows XP Media Center Edition 2005 (KB900325). For more information about this update, read Microsoft Knowledge Base Article 910393.
Download: Update for Media Center Edition 2005