Version of Windows XP that you can carry on your USB drive only weighs about 50 MB installed, it is excellent to rescue files if your operating system is dead. Portable version of Windows XP for USB, extra small, ideal for maintenance, to support information or images of the SO The S.O. is in English and only weighs 47Mb installed and includes a CD writer and Norton Ghost. Recommended USB 256Mb capacity. Boot from USB. Not all motherboards support this boot.