Windows XP is an operating system originally released by Microsoft in 2001. Its official support ended in April 2014. Any “Sweet 51” version is not an official Microsoft release . It appears to be an unofficial, modified “custom ISO” — likely created by an individual or group who integrated extra software, themes, drivers, or “tweaks” under a nickname like “Sweet” or “Sweet 51.”
The Legacy of Windows XP Sweet 51: Understanding the Custom French SP3 ISO windows xp sweet 51 version francais sp3 integre iso 2021