Windows XP Live USB installer creator app is a software tool designed to facilitate the creation of a bootable USB drive containing a live or portable version of the Windows XP operating system. These applications are typically third-party tools as Windows XP itself lacks built-in support for creating such bootable media. The primary functions of these apps include copying the Windows XP installation files from a source (usually an ISO image) to a USB flash drive and configuring the USB drive to be bootable.

They often offer user-friendly interfaces to guide users through the process. Some may also allow for additional customizations, such as including drivers or software packages to enhance the user experience. These tools were popular for running Windows XP on computers without installing it on the hard drive, particularly on older hardware. However, their usage is discouraged due to security risks associated with running an outdated and unsupported operating system. Users are encouraged to upgrade to more modern and secure operating systems.