How to Install Windows 7 From USB Drive without Windows 7 ISO DVD

I attempeted to mount the .iso file using the magic disc download in the directions. and upon attempting to mount, windows 7 asked to start install. but that would make a dual boot right? also I was able to follow up to step 4. and wasn’t able to mount the .iso file. and couldn’t even get to step 5.the windows 7 is for a spare partition hard drive. can I simply install to the other drive? my current OS is on the C drive, and the spare is a D drive. or would it still be a dual boot? Thank You

there’s a mistake in section 5:

mbrwiz /disk=X /active=X (X is Disk Number of your USB Drive)

should be:

mbrwiz /disk=X /active=1 (X is Disk Number of your USB Drive)

the active argument gets 1 or 0.

another issue i stumbled with - bootsect.
i couldn’t run the bootsect from /boot/ on the DVD.
you can download the file from:
http://www.2shared.com/file/2585881/5ad9ef68/bootsect.html

thanks for the tutorial - will soon try installing.

Thank you! Worked like a charm. I was having issues installing this via DVD as certain files were ‘allegedly missing’ and this ran without a hiccup.

I’ve been trying this procedure but every time I go to start the boot from the USB stick, my system just hangs with a flashing cursor. I got no other errors through the whole process, just can’t seem to get the installer started. Can any offer some help?

Worked like a charm. Thanks for the post!!

so I figured out how to install Win 7. I installed onto my partitioned D drive and it worked like a charm. no .iso mounting needed. I’ve spent about 2 hours checking out and installing codecs and drivers.upon trying one of the games, windows 7 offeres to test your machine. and afterwards seemed to mock my graphics card. so to shut it up, I installed the latest nvidia driver from my external hard drive,cause I don’t use internet at home, get plenty of internet use at work.(which the driver works on xp) and now I some how broke windows 7 beta. it continues to go to a blue screen and reboots. I had to reformat my D drive and now here I sit, waiting on a fresh install of windows 7

when i typed in the command “bootsect/nt60 I:” it said that the boot code may be unreliable because it was denied access in the process. long story short i finished all the steps and rebooted but he problem was it would go to my normal boot screen when i booted from the USB pen drive. i need some help getting around this error and im wondering if it would have anythibg to do with the fact that i am useing an XP computer. its kinda annoyin because it worked for everyone else

never mind dude i figured out what the problem was. it isnt to clear in these instructions that the drive your are formatting cant be the source of the virtual drive. i finally figures out that the virtual drive is only there for the formatting alone and has to be ended as soon as the flash drive is formatted. thanks a million for the tutorial anyhow.

[...] Windows XP [...]

Yeah, I’m pretty sure this can be done without cmd. Way to complicate things.

I get my USB drive to boot….but it always says missing operating system even though I did copy the files from the mounted drive to the flash drive.

Any ideas?

(follows above post)

Also, I tried it on another machine and it worked. So no problem with the USB drive itself. There is an option in my BIOS (on the computer on which I want to install windows 7) for USB booting. I followed your guide to the letter.

This is for dual booting right

Is it possible to do this with an external HDD? I don’t have a Flash that big :(

Or isn’t there a way to copy the setup files to another drive and use a boot disk to sorta DOS it like i used to do with Win98 when my cd drive broke? I really wanna get this working on my old laptop but its over 3 years old and the DVD drive refuses to read. Everything else is good for the install though.

Or can i make another partition, copy the set up files there and boot that partition?

I manage to get to the point of putting it into my Acer Aspire F12 then it comes with an error it doesnt like file boot.bcd. I have linux on the Acer One

any ideas?

Regards

Tony

well I just thought I would add this into the post I was able to keep the windows 7 iso on another pc and share it over the network and mount it that way and install the 32 bit so none of this is needed under windows xp pro this will not work for 64 bit. also you can do an upgrade install or a clean install if you are running a 64 bit os it may work for the 64 but have not been able to try that yet

any questions just ask

also the command bootsect /nt60 Y: i could only get to work for 32 bit

how do you dir to directory??

@ Chris, how did you manage to set up your computer that way? I looking around for a guide how to do it but they all have XP which has the i386 folder and Win7 doesnt. Plus its taking me ages to go through the thing.

Ummm…..so guys….which is the latest and working?
I tried both, but didn’t work. My pendrives able to boot, I’ve tried these with HP boot utility, and a win98 startup disk and could boot, but I can’t install windows 7 with the mentioned methods.

I tried this with the 64bit version. After following all the directions and rebooting, I got:

An error occurred while attempting to read the boot configuration data.

File: \Boot\BCD

Worked for me. Had to use the HP USB Disk Storage Format Tool (not the softpaq exe distributed one, but the hpflash.zip one) to format the drive as bootable, as mbrwiz kept throwing errors when I would try to set the usb partition as active. Used an ME boot floppy for the DOS source, then continued on from your convert step, works like a bootable usb Windows 7 32-bit install package should!

Yup…now it works. The thing is…..I have windows 7 written on cd, had to make an iso file, and then mount it, and then it worked.
If I did it from the cd, it didn’t work…

Tried and worked great!!!

Will this method work with other versions of windows like XP, Vista, ect…

Can you not just format as NTFS in step 2 and then you wouldn’t need step 3?

[...] you have installed Windows 7 then you might know how much different it is from vista even though windows 7 is based on Vista [...]

bootsect /nt60 Y:

The bootsect application for the 64 bit version is a 64 bit application which will not run under 32 bits (in my case) Vista. This seams to mean that you can only prepare a USB drive with Windows 7 64 bit from a 64 bit OS? Any work arounds?

Does anyone know how I do this from Linux/Mac? We don’t all have windows but would quite like to give the new one a spin.

@Erik - can you not also download the 32 bit version and then mount the ISO file for the sole purpose of running bootsect? There is also a link posted to a bootsect file in the second comment to this blog entry.

@Wayne - I tried this (great idea by the way) but after I try to boot from USB all I get is a blinking cursor. I may burn the 64 bit ISO on a DVD after all.

i am using windows xp Professional and downloaded windows 7 i have tried all above procedure to make a bootable to my 4 GB USB Flash but i was unable to make it and got error ‘bootsect’ is not recognized as operable program or batch file. so tell me that how i will install win 7 one thing more i dont have any DVD rom or DVD-R please help.

Regrads

Irfan Soomro

@Irfan Jugnu - Are you trying to install Windows 7 x64? The error you get seems to be caused by running the 64 bit bootsect from a 32 bit version of Windows.

@Wayne - I gave it one more try. I figured out that it may be required to run the 64 bit version of bootsect so I planned to following:

1. Download VMWare Server (it’s free)
2. Mount the 64 bit ISO in a virtual machine
3. Install Windows 7 x64 within a VM
4. Add a virtual USB controller to the virtual machine
5. Prepare the USB stick as described in this article
6. Install Win7 from the USB stick for real :)

Using VMWare Server 1.08, step 4 doesn’t work.
I can choose from 3 USB devices but neither can be ‘mounted’. Ejecting or unmounting in the host OS (safely remove device in windows) Doesn’t help. VMWare’s log keeps saying: USBG: Removing stale connect request.

Hi ERIK
wel i am trying to install win 7 x64 plz support full installation method over flash usb 4GB.
Thanks

Tony,

how did you install from a file share? Did you just copy over the files and did a upgrade of WinXP32? OR did you do some form of network booting?

Chris,

the question above this post was to you….I saw the wrong name.

[...] How to Install Windows 7 From USB Drive on XP [...]

i faced problem in the beginnig: ” convert” is not recognized as an internal or external command… ” i m using win xp, i couldnt understand.. what is the problem.. does anyone have any idea? some prompt commands are not recognized.. as ” convert’ select’, etc…

Thank You!!!

[...] to Install Windows 7 From USB Drive without Windows 7 ISO DVD http://www.blogsdna.com/2016/how-to-install-windows-7-from-usb-drive-without-windows-7-iso-dvd.htm « Windows XP 32bit is limited to 4GB [...]

I used the process given above, tweaked up a bit to install Windows Vista on my Laptop, since my DVD RW drive wasn’t working.

Thanks. You saved me quite a bit of time, since the only other process I knew that would work was a network boot installation, which sucks to set up.

[...] I had a spare external drive sitting around, and I more-or-less followed these instructions for getting the installer running from there instead of the DVD. Setup is still running; stay tuned [...]

thanks for your guide!
i am running xp x64 (64 bit), and want to install win7 (32 bit) … and all my bootings ended with an “missing operation system”
so i tried to somehow run bootsect in 31 bit mode .. or something like that … i wasnt really sure what i did :)

then i found a guide using the ISOs bootsect like this
“bootsect /nt60 X: /mbr” (where X is the usbs drive letter)

now it works! :)

I had a problem with this step

“Now dir to directory where you have extracted MBRWiz and run following commands”

But this step is unnecccary if you place the MBRwiz.exe in the folder that is in the title bar of your cmd window. It should be C:\Windows\System32

Hi, I was also having the same problem as u did. Solution? I exited windows setup and started it all again.^^ Simple.

Thank you so much! This is the only site (that i found) that did not have diskpart in it. I have been trying to find a way to make dispart detect my usb, but never mind, problem solved!

[...] original article can be found here. It has some issues, and I corrected them and updated few other [...]

[...] Windows 7 or Vista install from USB Stick http://www.blogsdna.com/2016/how-to-install-windows-7-from-usb-drive-without-windows-7-iso-dvd.htm [...]

Can anyone help me out? I followed the directions exactly and copied over the iso to usb and when I boot it from my other laptop it says that “invalid or broken partition”? Any ideas?

[...] want install Ubuntu on USB flash drive and create bootable USB key but don’t k0nw how to do it then here is handy utility uSbuntu Live Creator 1.5 for this [...]

I had issues getting the iso to boot from my brand new Cruzer 8Gb. The screen would come up with a blinking cusrsor in the corner and that’s it.
Now it’s working.
Although the drive is not recognized as U3, I ran the U3 uninstaller. This will wipe the USB stick, but for some reason it is now working like a charm.
U3 Uninstaller: http://www.tacktech.com/display.cfm?ttid=391

i cannot boot from USB !
it’s display No partition boot in table.
i need help pls.

Thanks it worked like a charm.

[...] anyway to install it off a usb stick?? sorry if wrong post but i dont have any spare dvds Follow this and you are set to go . Did this for my brother and works perfectly. [...]

[...] tired of burning perfectly good DVDs repeatedly for Windows 7 beta testing. Instead, I decided to follow these excellent instructions and copy the contents of the ISO image onto a USB stick and boot from [...]

I carried out ur instructions to the letter and succeeded in creating a bootable flash drive. But i’m still not getting the option to boot from usb in my BIOS. I have a Dell Optiplex GX260 version A02. Can someone please help me out?

Works great! Thank you so much!

I’m trying to install RC1, but I can’t get MBRWiz to work. When I try to list the drives (step 5) I get error 23: - no disk identified, or insufficient user priviledges.
Is there another way to do this?

For all of you who cannot get your thumb drive to even boot…(maybe I did something wrong)…but you can unhide system files and copy over the “boot.ini” “NTDETECT.COM” and “ntldr” from the root of your HDD to the root of your thumb.

The error I was getting previous to this solution was something along the lines of Failed to load or error loading operating system.

Hope that helps anyone!

Also in addition to the above post ^^^^

I am about to try to run Windows 7 with 512 mb of memory, I’ll let you all know how that turns out.

@Duckworth
I am running Win7 Beta at home with 3/4 GB RAM so I think you’ll be okay with just a 1/2 GB and the new RC states it needs a minimum of 1GB to run.

2gb? Who needs it. 512mb works fine.

All Step Complete.
After Select BIOS Boot USB
Show Message Missing Operating System.
How To ?

I’m building Win 7 32 bit Release Candidate on XP Pro SP3 32 bit, and also from a 64bit Vista SP1. I get “error loading operating system” when trying to boot from USB thumb on 2 different computers. When on XP I tried copying boot.ini” “NTDETECT.COM” and “ntldr” as things and stuff suggested, but that didn’t help.

if you end up with the blank screen with a blinking “_” you need to run this command from a command prompt:

“bootsect /nt60 X: /mbr” (where X is the usbs drive letter)

That will fix you error reboot and you should be installing Windows 7!

“For all of you who cannot get your thumb drive to even boot…(maybe I did something wrong)…but you can unhide system files and copy over the “boot.ini” “NTDETECT.COM” and “ntldr” from the root of your HDD to the root of your thumb.

The error I was getting previous to this solution was something along the lines of Failed to load or error loading operating system.

Hope that helps anyone!”

don’t really get this, can you explain any better?
i can’t seem to boot it.. i get a blinking -

[...] many links like: Creating Bootable Vista / Windows 7 USB Flash Drive at Kevin’s Blog and How to Install Windows 7 From USB Drive without Windows 7 ISO DVD The second link (only one I tried) worked for me the first [...]

Hey guys i did the boot usb key on a data traveler 8gig! all work boot and start but im getting error cant load clfs.sys file couldnt find….. i got file. i can copy it.. i just dont know where to put it in my usbkey to fix it! any1 can help me plz?

for those that diskpart won’t recognize your usb, it’s about “flipping the removable bit”. LEXAR brand drives have an executable app that works on their own drives, and a few others. for all other usb’s it can be done in notepad and put in registry. then usb’s show up with “local drives” instead of showing up with cd drives @ the bottom. GUARANTEED.sometimes you can go to properties of usb drive ie… “policies” and click on optimize for performance, not quick removal and that works, sometimes. you can google “flipping the removable bit” and find the info since i don’t have it in front of my face at this time.btw-i boot WIN_se7en off a 2G/B lexar 360 jump drive (my iso is only 1.43G/B’s, thanks to vlite
WIN7 release 7127
Written by Michael

I confirm Tzafrir’s post - mbrwiz /disk=X /active=X

active argument as to be indeed 1, not the drive number. My usb stick was number 6 and 6 was not a valid argument for Active. After I set it to 1, it was activated successfully.

I’m getting this one when trying to boot :”Invalid or damaged bootable Partition”.

Any Ideas please?

tried above and yes it works, however any body tried for 64 bit iso? i have vista 32 bit and i need to install windows 7 64 bit from a usb drive. Am i asking too much?

[...] FolBlog, ma non sono riuscito perche’ non partivo da Vista. Se avete un Xp sottomano invece, potete seguire questa guida per mettere la vostra ISO di Windows 7 su Usb e installarlo da [...]

I have recently tried to use this method and i have done everything correct so far. I set my flash drive to active and then rechecked to make sure it was active with the mbrwiz/list command and it is active. I then proceed to the next step
J: (Drive letter of Windows 7 iso mounted with demon tool)

CD boot

bootsect /nt60 Y: (Y is drive latter of your USB drive )
and when i do this the drive is no longer active!!!! MAKING ME MAD
I then copied all the files over to the flash drive and tried booting and no luck. I then reactivated the drive and tried again with no luck.
for some reason my flash drive will not stay active
HELP PLEASE

ok i fixed my firt problem. Now i have another. I had to reformat the flash drive with the suggested hpflash program. After i did that i followed the rest of the steps. Now windows begins to boot from the flash drive and it says loading windows files with a status bar on the bottom. Once it finishes loading the files it gets an error and says an unexpected error has occured with a code 0xc0000098. HELP

bootsect from W7×32 .iso will only run from x32 bit system.
bootsect from W7×64 .iso will only run from x64 bit system.

To prepare W7 x64 from a x32bit system:
1) download BOTH W7×64 and W7×32.
2) Mount your W7×32 .iso.
3) run bootsect /nt60 Y: (Y is drive latter of your USB drive ) from W7×32 .iso, to prepare your USB key.
4) Now unmount W7×32 and mount W7×64 .iso
5) Extract W7×64 to the USB key.
6) Boot from USB.
Bootsec will prepare USB the same way, regardless of x(bits).

I also used bootsec from WindowsServer 2008 x32 to prepare my USB drive.
Then I extract W7×64 .iso contents to the USB.

work perfectly for me .. :)

I had a problem booting from USB, but the command “bootsect /nt60 X: /mbr” fix it… Thanks to all…

Thanks to the post above by (James) that sorted my problem out :)