Mobile hard disk /U disk installed _Windows7 system advantages and methods

There are n ways to install a new Windows system, here, n >= 5.
Hard disk installation, CD installation, U disk installation, virtual CD-ROM installation, Ghost installation and so on.
Today, I would like to say a few words to the novice friends to install Win7 with a USB flash drive or a mobile hard disk.
1, the installation speed is fast
Normal CD-ROM installation can generally be 20-35 minutes, but it is faster to install Windows7 with USB mobile hard disk, generally a new installation does not exceed 10 minutes. Of course, the U disk can also be done, but the U disk is too slow to copy small files.
2, easy to adjust the partition size of the computer's internal hard disk
The advantage of installing Windows7 with an external device is that you can freely partition the hard disk in the computer, of course, you can also use CD-ROM installation, here is the use of virtual drive Or the way the hard disk is installed.
3, convenient to change the Win7 version
use the medium of the CD to store things, the storage is not good, there are scratches, the disc is not said, and it is still read-only, with USB mobile hard disk or U disk will not have This problem can be changed under the installation configuration file, what version of Windows7 or Vista you want to install, you have the final say. See: "Want to install the installed version: Windows7 installation CD version conversion software" windows7 system download.
Appendix: USB mobile hard disk or U disk installation process introduction
1 Under Vista or Win7, enter the control panel - management tools - computer management - disk management, right click on the partition of usb mobile hard disk, click "ld" ; Mark the partition as the active partition”.
2 Copy all the files and folders in the Windows7 installation disk (or the iso file directly, or use the virtual CD-ROM drive) directly to the usb mobile hard disk.
3 The usb hard disk installation disk that can be booted is completed. After setting up the usb hard disk in bios, it is as simple as starting the installation program directly.
The third party software is not needed at all, and there is no need to engrave.
The principle is very simple, the first step is to write the startup information. Activate the partition under Vista/Win7, then write bootmgr, if you activate the partition under xp, it is written to ntldr.