: It applies safe system-wide adjustments to improve character shaping and prevent diacritics from jumping away from their base characters. Regional Settings

: It verifies and prioritizes Sinhala Unicode fonts, such as Iskoola Pota, ensuring that applications like Microsoft Office and web browsers render text accurately.

If your hardware can run Vista, it can almost certainly run Windows 7 (which is also end-of-life but more stable) or Windows 10 (which is safer and faster).

: Rectangular boxes appearing instead of actual Sinhala characters in browsers or Microsoft Office.