How to boot and install windows 7 using a pen drive

Windows 7 is quite a while now.If you want to boot your windows searching for DVD's.Now you can make an bootable pendrive.Here is the procedure to create a bootable USB drive for your windows on your system.

STEP 1:format your pen drive with NTFS
windows xp users need to do the following thing.
go to control panel->system->hardware->device manager.
Under the disk drives section, right click on the USB storage drive and select Properties.

Go to the Policies tab, select optimize for performance. Click OK

Open your Windows Explorer, you should see the USB storage drive in the inventory. Right click and select Format. Select NTFS from the drop down bar. Click Start.

For Windows XP,
Download MBRWizard. Extract the zipped files to your desktop.
Open a command prompt (Start –> Program –> Accessories –> Command Prompt).
cd Desktop/MBRWiz2.0/
MBRWiz /list

Record the USB flash drive disk number

Make the USB drive active.
mbrwiz /disk=X /active=1

For Windows Vista,
On the Start menu, navigate to the command prompt entry. Right-click and select Run as administrator.

Type
diskpart
list disk

Record the disk number of your USB flash drive.

Select the USB disk.
select disk X (X is the drive number of the USB flash drive)

List the current partition. Record the partition number.
list partition

Select the current partition and make it active.
select partition Y (Y is the partition number of the USB flash drive)
active

DONT CLOSE YOUR COMMAND PROMPT.IF YOU DO SO YOU WILL HAVE TO DO EVERYTHING AGAIN

Creating bootable USB flash drive

Download Windows 7 iso (32-bit) torrents over the net to your desktop
Download and install WinRAR.
Right-click on the Windows 7 iso file and select Extract files. Extract the files to a folder (you can name the folder any name you want, but for illustration purpose, I name it win-7) in your desktop.

In your command prompt, cd to the windows 7 folder.
cd Desktop/win-7 (Change the destination to the folder that you have extracted)
cd boot
bootsect /nt60 X: (X is the drive latter of your USB drive )

Now, copy all the files from the Windows 7 folder to the USB flash drive.
Reboot the computer. Remember to change the first boot device to your USB drive in the BIOS.
You should be able to install Windows 7 from your USB flash drive now.