Fonts that are protected by Windows File Protection.
Windows File Protection is a feature of Windows XP that prevents the unauthorized replacement of essential system files. WFP runs as a background process on Windows XP and monitors certain files. When WFP detects that a protected file has been changed, it restores the original.
Protected files include the following files that ship on the Windows XP product CD:
If the application requires newer versions of these components, it must update these components by using a Microsoft Service Pack that installs the required versions.