MSDLG874.FON is a font file used by the Windows operating system. The .FON extension indicates that it is a bitmap font file, which was widely used in older versions of Windows, including Windows XP. Font files like MSDLG874.FON are essential for displaying text in various dialog boxes and system messages.
Before replacing system files, create a System Restore point. Conclusion
While it is frequently listed on various driver and system file repository sites, you should exercise caution: System Origin : It is often part of a Microsoft Font Pack