While highly stable, BartPE is a stripped-down environment. It cannot save permanent registry changes or run complex software that requires full hardware graphics acceleration. Method 3: The True Hardcore Hack (Registry Modification)

If you successfully boot Windows XP from a USB drive, you must optimize it to prevent the operating system from destroying your flash media:

If you do build a portable XP drive, Windows XP hasn't seen a security update in a decade. Connecting a portable XP stick to the modern internet is like walking into a blizzard in a t-shirt—you’re going to catch something. The Verdict