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How To Install Windows7 From USB Pen Drive

Hey guys today i am telling you about how to install Windows7 from USB stick or pen drive.I think most of the users will know already but as Windows 7 is releasing on 22/10/2009 which is really very near, i think you should know this method. As it can save your time and your blank DVD's also, Because installing from USB is much faster than installing from DVD. I have tried this method myself 5-6 times as i'm using windows 7 from past 6 months. I made this tutorial as easy that even a novice can create one for him. So here we go:

Installing Windows 7 with a USB flash drive - What you need:
The Windows 7 ISO weighs a hefty 2.5GB of disk space, so a flash drive with at least 4GB of space is required. Also, you need the following programs: BootSect, USB_prep8, and PeToUSB. All of which can be downloaded in a handy package that I’ve uploaded here:
Free Download Links:

When you have everything ready, insert your flash drive, plug in your notebook/laptop/netbook or whatever you call it to AC power and get ready to create a Windows 7 bootable USB flash drive.
Installing Windows 7 with a USB flash drive - Preparation
1. Download the packed RAR file which I gave you the link to earlier and extract its contents to your computer’s Desktop (this makes things easier). This contains the three programs you will need to make a bootable USB flash drive, which are BootSect, USB_prep8, and PeToUSB.
Now that the bootsect and USB_prep8 folders are on your Desktop, do the following.


2. Open the USB_prep8 folder, find USB_prep8.cmd and run it, pressing any key to continue when prompted. This will initiate PeToUSB. PeToUSB will be used to format your flash drive, so it is suggested that you back up any valuable data that you might have on your flash drive before proceeding. Once the backup’s done or you are sure it’s OK for you to format your flash drive, see the PeToUSB options and make sure that “Enable Disk Format”, “Quick Format” and “Enable LBA (FAT16X)” are checked. See photo below.

3. Make your USB flash drive bootable using bootsect. Here’s how.
Assuming that the bootsect folder you extracted earlier is already on your desktop, simply do the following. Open a command prompt window by pressing the Windows key + R (or going to Start > Run > typing “cmd” without the quotation marks and hitting Enter).
At the command prompt, type the following word for word:
Free Download Links:
1. “cd Desktop”
2. “cd bootsect”
3. “BootSect.exe”
4. “BootSect.exe /nt60 d:” (wherein “d” stands for the designated letter of my USB flash drive; exchange it with yours if it’s different, since it could be e, f, g, etc.)
Here’s a photo of what it should look like:

And if all goes well, you should be able to read the following message: “Bootcode was successfully updated on all volumes”. This means you now have a bootable USB flash drive. Congratulations!

4. Copy the Windows 7 install files to your bootable USB flash drive. Perhaps the easiest step in all of this minor hackery, is this. Find your Windows 7 beta ISO file, extract its contents using WinRAR, and copy the resulting files (all of them) into your empty and newly configured to boot USB flash drive. Once that’s done, safely remove it, and use it to boot any computer to install Windows 7 on it. It’s that simple.
Installing Windows 7 with a USB flash drive - What now?

Now that you have a bootable USB flash drive with the Windows 7 install files inside it, you’ll be able to install Windows 7 on any machine, provided that the hardware supports it. I may have been unsuccessful in installing Windows 7 on my Aspire One, but I did succeed in installing it on my other laptop, which proves that the bootable USB flash drive I made works.
Hopefully, this little thing I’ve done helps someone out there. Maybe someone like me who didn’t have a spare blank DVD on hand when I wanted to install Windows 7 so bad.
Please say thanx if it helped you.

Note: One of my friend has confirmed that it also works for the installation of Windows Vista from USB drive.So you can use it for installing Vista .


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