Windows XP is a popular version released in 2001 and now with discontinued support from the manufacturer. There are many newer versions such as Windows 10 Pro, Windows 7 Ultimate. XP was very popular because was very stable and intuitive to be used. When Windows 8 was released, many people installed XP back because they were so used with XP interface.
You need to create a bootable USB or CD/DVD disc with this ISO file to install the operating system. This is not the online installer, is the official full download version, a direct ISO download. You will need a valid product key to use this operating system.
It is part from operating systems category and is licensed as shareware for Windows 32-bit and 64-bit platform and can be used as a free trial until the trial period will end. The Windows XP SP3 (Official ISO Image) demo is available to all software users as a free download with potential restrictions compared with the full version.