One person who posted a huge 43GB torrent file claimed to have leaked Windows XP source code. According to the claim, the source code had already been in the hands of hackers for years. A torrent file uploaded to 4chan. Source codes of Windows 2000, Windows CE, MS DOS, Windows Embedded and Windows NT are also included in the leaked data. [Link removed] If you don’t want to download whole file. There is also a 2.9 GB zip file that contains only the source code for Windows XP and Windows Server 2003. Microsoft hasn’t commented on this subject yet. Although , support for XP ended in 2014, there are still users who still are using this operating system.