Yes you can install Windows 7 from a USB drive.

Our buddy over at Bauer-Power was able to install Windows 7 directly from his USB drive. Check out his method below:
I was having some performance issues on my Dell Mini 9 recently and decided to start doing some optimization. One of the things I was going to do was change the Page file settings from system managed, like they are by default, to a static size.
Well, I had filled up my drive, and didn’t have enough room to do that, so I decided to re-build my Dell Mini. Why not? It’s the weekend, and I didn’t have anything important save on it anyway. So like normal, I pull out my external DVD drive that I purchased with my netbook, and began trying to re-install. That is when I started having problems.
This actually happens every time I try to install anything via CD or DVD on the Dell Mini. The external drive that came with it is hit or miss. I looked online, and it appears to be a common issue with the Dell Mini. Let me tell you it is frustrating as hell!
The good news is that I can boot off of a USB stick no problem. In fact, that is how I install my Bauer-Puntu partition on the Dell Mini. What about the Windows half though? Well it turns out it is fairly easy to make a bootable USB Windows 7 install stick!
All you need is a Windows 7 install DVD, and a 4GB USB Flash drive. Don’t have one? You can get a Bauer-Power one here: Bauer-Power 4GB USB
Better yet, you get one for only $10.99 $5.65 from Amazon here: 4GB USB
Once you have your materials, just do the following:
- On another computer, open a command prompt as administrator
- Plug in your 4GB USB thumb drive
- Run DiskPart
- Type List Disk and hit enter (Note the number of your drive, e.g. Disk 1)
- Type Select Disk 1and hit enter (Where 1 is the number of your disk)
- Type Clean and hit enter
- Type Create Partition Primary and hit enter
- Type Select Partition 1 and hit enter
- Type Active and hit enter
- Type Format FS=NTFS and hit enter (This will take a while)
- Type Assign and hit enter
- Type Exit to quit DiskPart
Once that part is complete, keep your command prompt open and pop in your Windows 7 DVD, then do the following from command line:
- Type in F: and hit enter (Where F: is the drive letter of your DVD Drive)
- Type CD Boot and hit enter
- Type Bootsect /NT60 M: (Where M: is the drive letter of your USB Flash drive)
- Now copy the contents of your Windows 7 DVD to your thumb drive and you are ready to install from USB!
After performing the above steps, I recommend creating an image of your install thumb drive so you don’t have to remember all of the above later. To do that just download Roadkil’s Disk Image tool, and save an exact copy of your USB stick to your hard drive some place. If you ever need to use it again, you can re-image your USB stick with the same tool.
Are you a Dell Mini user? Are you having problems with your external DVD drive? Know of an easier tool to create a Windows 7 install USB thumb drive? Hit me up in the comments!
[via Bauer-power ]
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about 2 years ago
I never needed to do the second set of commands. Just doing the first set and copying the files from the DVD worked fine for me.
Then when you are done with the install, you can use the USB drive for ReadyBoost.
about 2 years ago
Awesome update Peter and glad to see you around. How is everything going nowadays?
about 2 years ago
Wonder if you have seen the usb tool from microsoft?
I have asmall write up here:
http://www.evilmunky.com/?p=1053
about 2 years ago
make iso image of win7 dvd,mount image,send files from image to flash drive,then boot…..simples
about 2 years ago
What about making the drive bootable?
about 2 years ago
in reply to karl, you dont have to make it bootable…..it reads the win7set up file….i done this yesterday on a dell studio hybrid,because of the drivers being disabled when installing on a drive,couldn`t do it using a usb external drive either,so done what i suggested…..less than an hour later….taadaa..windows7 all present and correct….replying to from it now…hope this helps……..webby
about 2 years ago
me again……do remember to download the microsoft win7 upgrade manager to see if your system can run win7…..(lots of conflicts between vista and win7 apps,windows blinds 6 or higher,ashampoo burning studio 10 to name but a few), if you dont….it just rolls you back to your previous os……this was done using a cruzer 4gb flash drive,nothing fancy….
about 2 years ago
Um but the post was supposed to show you how to install off of the USB stick. That still uses the CD not the files stored on the stick. Making the stick bootable replaces the media all together.
about 2 years ago
Are we talking about the Windows 7 upgrade adviser located here http://www.microsoft.com/downloads/details.aspx?FamilyID=1B544E90-7659-4BD9-9E51-2497C146AF15&displaylang=en ?
about 2 years ago
no…you make the iso image from the cd/dvd on another pc,then mount the iso,open it and send all the files to the flash drive on the same pc….then put the flash drive into the pc you want win7 on, change the boot from hard drive to usb then start the pc go to your computer double click your flash drive and then double click on the blue win7 set up and away you go………
about 2 years ago
if it`s the uk center,type in upgrade advisor at the top,then it`s the third one down…….if the us center its the fourth one down in the top downloads……. i used the uk one,saved it came off the web,then opened it….it tells you if there are any progs` you have to uninstall before the upgrade…these are shown by a yellow triangles on the left hand side…windows blinds 6 or higher does not show on your uninstall list,if you have added any new themes to the os uninstall them or do a system restore to get rid of them……hope this helps
about 11 months ago
Do you have a write up for booting XP from a USB? Thxs.