Windows Vista and Windows 7 can be installed via a bootable USB drive as well. And the installation would be much easier and faster than installation via DVD. Windows Server 2008 & Windows Server 2008 R2 also can be installed via USB drive except installation of Windows 7 & Windows Vista .
Initially Windows Vista/7 DVD or installation source (setup backup files stored on local hard disk) & a 4GB USB 2.0 Storage device would be required. You can follow the steps to install Windows Vista/7 from USB Drive.
1. Plug your USB storage device and run CMD and execute the following commands one after another.
A: Diskpart Run Disk partition utility
B: List disk To get disk index that is used to perform disk partitioning.
C: Select disk 1 Selects disk to perform disk partitioning.
D: Clean Flush your existing all USB drive’s partitions.
E: Create partition primary Creates a partition as primary partition.
F: Format recommended Format your USB drive with recommended parameters. (No need to worry about file system format)
G: Active Set the partition as active to hold bootmgr.
H: Exit To quit Diskpart utility
2. After executing the above commands simply copy all Windows Vista/7 files from DVD/Backup storage to USB storage device.
3. Change boot settings from BIOS and set it to boot with your USB drive, you can install Windows Vista/7 via bootable USB storage device. That is it.
Note: For boot problems try Fixing your USB Storage drive with the command I:\Boot\Bootsect.exe /NT60 I: where I: is the drive letter of USB storage device.
"Windows 7 Tips: Install Vista and Windows 7 using bootable USB storage device"
Reference : www.WindowsVJ.com
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