This post will teach you, How to install XP, 7, 8, 8.1 using bootable Pen drive, USB or Flash drive. It is the easiest way to install Windows using USB Requirements: A Pen drive, USB or Flash drive (Minimum 4 GB or more) A Windows XP, Windows 7, Windows 8, Windows 8.1 ISO (which you can make using any CD/DVD image creating software like ImageISO, MagicISO etc.) " Win to USB " Software, Click here to download (Its a Microsoft Product, So there is no need to say that, It doesn't contain any Virus, Malware or Spyware) Windows XP SP2, Windows Vista, or Windows 7 (32-bit or 64-bit) Pentium 233-megahertz (MHz) processor or faster (300MHz is recommended) 50MB of free space on your hard drive DVD-R drive or 4GB removable USB drive For Windows XP users The following applications must be installed prior to installing the tool Microsoft .NET Framework 2.0 must be installed. It can be Downloaded Here Microsoft Image Mastering API v2 must be installed. It can be Downloaded He