PE on the computer is a pre installed environment for a simplified version of windows system.
Windows PE is the smallest operating system of a computer designed for windows installation. It can be used to start a computer without an operating system, partition and format hard drives, copy disk images, and start Windows Setup from a network share. Use Windows PE to create, delete, format and manage NTFS file system partitions, win PE.
Winpe is a simplified version of Windows XP or Windows Server 2003. Generally speaking, windowspe is used to install the system and partition more. Understand PE as a powerful and compact XP system running directly on CD. The full name of Windows PE is windows preinstallation environment, that is, Microsoft Windows preinstallation environment. It is a tool based on Windows XP Professional running in protected mode, Win32 subsystem with few (but very core) services. (diannaopeshishenmeyisai)